Tuesday, August 17, 2010

Recommendations to deal with global warming

Action plan with 10 recommendations on dealing with global warming, as first published in 2007, complemented by a further 4 more recent recommendations.



1. Energy feebates

Impose fees on fossil fuel, on polluting power plants and on engines to fund local programs to electrify transport and to supply electricity in clean and safe ways, in particular by facilities that produce wind, solar, hydro-electric, geothermal, tidal and wave power. Link fees to rebates, through feebates tailored to fit local circumstances and to encourage electricified transport powered by renewables (see image below).


2. End perverse energy subsidies

End support for fossil fuel. There still are too many perverse subsidies for fossil fuel.


3. Global commitment

Agree on and support a new International Treaty, such as a strengthened Copenhagen Accord or a renewed Kyoto Protocol. Each nation should commit to reduce its emissions by, say, 10% annually. Nations should each be able to decide for themselves how to do this, provided they each meet their targets independently and genuinely (i.e. without buying or fabricating offsets or credits domestically or abroad). Border adjustments can help ensure that commitments are indeed met. As further discussed below, nations will also need to bring the atmosphere and oceans back to their pre-industrial state, and geo-engineering methods will need to be included, in a responsible way, as an indispensable part of such a comprehensive climate action plan.


4. Lifestyle change

Support lifestyles that are more environmentally-friendly. Encourage use of the Internet as an alternative to travel and commuting. Encourage homeschooling and working from home. Deregulate taxi services.


5. Standards

Impose standards and industry-specific regulations to ban products that cause large amounts of emissions, where good alternatives are readily available. An example of this would be incandescent light bulbs and gases used for cleaning and for refrigeration and air conditioning. Many nations have meanwhile set a date for a national ban and do actively promote a global ban. Another example would be gases used for cleaning and for refrigeration and air conditioning. Standards could be complemented by feebates, e.g. fees on sales of air conditioners that need HCFC-22, as well as on sales of HCFC-22 itself, while using revenues to fund rebates on the cleaner alternatives.


6. Support solutions

Support clean and safe energy. Apart from financial support, there must also be more active support in regulations and government policy to develop new facilities. Don't pick winners, but encourage competition and diversity among suppliers of such energy. Encourage interconnection and overlap of electricity grids, so that households can choose which grid to sell electricity to, if they generate a surplus in their backyard. Where needed, stop protecting intellectual property and use eminent domain provisions and fast-tracking legislation to speed up development of infrastructure.


7. Urban planning

Plan and develop new green communities, such as communities without roads (i.e. with footpaths and bikepaths instead of roads). Plan houses close together, around a local center of shops and restaurants. Redesign existing cities so that people have to travel less. Impose fees on combustion ovens and use the revenues to support energy saving programs, such as distribution of solar cookers (see image below), solar LED lights, more efficient appliances, buildings, etc.


8. Further feebates: Biochar and olivine

Support biochar and olivine. Impose fees on the sale of Portland cement, livestock products and nitrogen fertilizers and use the revenues to support biochar. Pyrolysis should be the preferred way to handle surplus biomass (see image below).


9. Government should lead

Make government take the lead in reducing emissions. Ask for ideas. Have more staff work from home. Look at ways to offer services over the phone, over the Net, etc.


10. Disclosure

Disclosure. Make that government departments and large companies publicly disclose their emissions of greenhouse gases. Make products display on their packaging the amounts of greenhouse gases needed to produce it.


The above ten recommendations have remained much the same since first posted back in April 2007, in Ten recommendations to deal with global warming. However, too little has happened since, reason for the need to add another four recommendations:


11. Adaptation

Prepare for the impact of climate change. Preserve species that are under threat from climate change. Protect and support areas such as rain forests. Assist with adaptation.


12. Carbon dioxide removal

As discussed under 8., various methods to remove carbon dioxide should be jointly applied to restore oceans and the atmosphere to their pre-industrial state, such as through biochar burial and olivine weathering. Furthermore, methods of carbon capture from ambient air should be supported. Fees could be imposed on aviation, while the revenues could be used to support carbon air capture, which could in turn produce synthetic fuel for use in aviation, thus kick-starting carbon air capture technology.


13. Further geo-engineering

Study, consider and responsibly deploy further geo-engineering methods to increase solar reflection and to deal with methane, in order to reduce the risk of runaway global warming, and use techniques such as algae bags to reduce acidification of oceans and pollution in general, in addition to above carbon dioxide removal methods.


14. Afforestation

Deploy plans for afforestation. Plan for desalination to irrigate and vegetate deserts and other areas with little vegetation.

Tuesday, February 3, 2009

Open Letter warning President Obama about a Global Cap-and-Trade Scheme

President Obama, please read this!

The energy and environmental policy that you have proposed for the U.S. is a patchwork of policies, ranging from higher fuel efficiency standards and subsidies for energy conservation and renewable energy, to "an economy-wide cap-and-trade program".

The problem is that the cap-and-trade program is not what it claims to be: it claims that it would reduce greenhouse gas emissions 80% by 2050. However, a cap-and-trade program would not only be ineffective in reducing greenhouse gases, it would actually be counter-productive and lead to further pollution and environmental harm. Moreover, a cap-and-trade program would come at the detriment of other policies, the very policies that we need to implement, in order to reduce greenhouse gases.

President Obama, you have an important choice to make in the lead-up to C4, the Copenhagen Climate Change Conference. Instead of supporting cap-and-trade, it makes more sense to work towards an agreement for all countries to commit to each reduce greenhouse gases by a set percentage per year. Each country can then work out how best to make their reductions, leaving them a wide range of policy instruments (such as standards, taxes, fees, subsidies and rebates) to choose from, each establishing the mix that best facilitates the shifts that need to take place in their area of the world. While I am convinced that feebates will work best in many cases, areas should each decide for themselves what policy instruments they prefer. The main goal now is to support the commitment that is there around the world to steadily reduce greenhouse gases, to use this as the basis for a global agreement and to work out sanctions (such as tariffs) to back up this commitment.

Yes, we should help developing nations, but we should reconsider how we want other countries to "develop". We don't want to pay India, Pakistan and other Asian and African nations to imitate the lifestyle of "developed" countries, i.e. people traveling by car or plane to work in polluting industries, to return home to feed on a diet of meat and ice cream. Current levels of meat production alone add nearly 6.5 billion tons of CO2-equivalent greenhouse gases every year to the atmosphere, which constitutes some 18% of the worldwide annual production of 36 billion tons. Environmentally spoken, we need to ensure that "developing" nations do NOT develop into lookalikes of what we're now.

A global cap-and-trade scheme would not lead to reductions in greenhouse gases, instead would be counter-productive and would most likely make things a lot worse, for many reasons. But first, let's get one thing straight: a cap-and-trade scheme is NOT a "market" solution.

1. The cap is a regulatory monstrosity requiring extensive administration and policing, at substantial cost and risk of fraud and failure. It's a recipe for disputes, even war, about political decisions to prohibit one what another is allowed to do.

2. A cap-and-trade scheme may claim to give markets clarity by "putting a price on pollution", but it does not set a price, it only produces "permits to pollute", while floating the price. That may give speculators, lawyers and financial advisers opportunities to enrich themselves, but it doesn't give markets clarity about the cost of resources. Even in the unlikely case that the whole world would agree on a global cap-and-trade scheme, it's likely that politicians would keep changing the price, the number and the conditions of these permits -- there would be little or no clarity for investors, instead there are bound to be privileges for some and confusion for others, which all comes at the expense of giving markets the clarity they ask, in order to plan and develop the job and investment opportunities in the clean industries that we all need.

3. Apart from cost clarity, markets need investment confidence. Markets work better with some idea where best to invest and where to create job opportunities. Permits-to-pollute effectively constitute a tax on many products. It's the stick without the carrot -- it only targets pollution and protects polluters who want to keep polluting. Markets, by contrast, don't work well in the sole prospect of death and taxes. Instead, markets prosper in a healthy environment that promises opportunities for profits, investment and appreciation of brand name and assets, i.e. the carrot.

4. Markets are not calling for opportunities to trade in permits to spoil the environment. A small group of people may call for trading in permits, typically those who would feed on the profits of such trade. Indeed, those who advocate cap-and-trade most are likely to be the same lawyers, bureaucrats, speculators and financial advisers that have brought the world into the worst global crisis since the Great Depression. These are some of the very people that earlier sought to gain commission by propagating the myth that it was in the economic interest of the U.S. to become dependent on oil imports, to keep sending borrowed money to some of the politically most volatile regions in the world, while nurturing a perceived need for a U.S. military presence in those areas. All this has come at a terrible environmental and financial cost, at the cost of much human misery and at the expense of many good job and investment opportunities in local markets for clean and safe ways to produce energy.

5. While a cap-and-trade scheme is silent about what is to happen with the proceeds of the sale of permits, there should be no surprise as to what would happen if a cap-and-trade scheme would be imposed globally. A substantial part of the proceeds will flow from the rich and most polluting nations to the poorest places in the world, such as India, Pakistan and other Asian and African nations. A global cap-and-trade scheme would only allow the rich and polluting countries to keep polluting, while the people in these poor countries would be inclined to spend the money on things like polluting cars and eating meat, the very things that cause the worst pollution. Handing over money to government bureaucrats in poor countries makes them prone to accept bribes by industrialists who seek to sell more nuclear and coal-fired power plants. It's not markets that want this. Nobody benefits from this. It's a recipe for environmental disaster, corruption, terrorism and war, all resulting from policies that were ill-conceived and doomed to fail.

Should I go on describing why a global cap-and-trade scheme wouldn't work? Let's face it, cap-and-trade is a scheme designed by polluters to keep polluting - what both people and markets want is the opposite: Both people and markets want government to stop protecting the polluters and to instead support the safe and clean solutions that we all want and need. People want to live in a healthy environment. Markets want to invest in solutions that combine prosperity with a healthy environment.

Markets do not want to give "developing" nations the proceeds of such a cap-and-trade scheme. It isn't that markets are greedy, but the truth is that a global cap-and-trade scheme would be counter-productive and only lead to more people driving polluting cars and eating meat. I suggest that, if we are to impose a form of tax anyway, then let's simply impose fees on polluting practices, while using the proceeds where they were raised, in order to create better alternatives at the very places where such alternatives are needed most. Insisting that, to be applicable for rebates, alternatives should be clean and safe, that would genuinely allow market mechanisms to sort out what works best, while optimizing consumer choice and opportunities for jobs and for investment. That is what markets want and how they work best. Such a combination of fees and rebates (FeeBates) can be self-funding and budget-neutral, thus avoiding unnecessary bureaucracy and political turmoil. Nonetheless, as I said earlier, each area should be allowed to decide on their preferred mix of policies.

In conclusion, we should reject a global cap-and-trade scheme and instead work on a global commitment to reduce greenhouse gases, which should be assisted by information on how best to achieve afforestation, to make and use solar cookers, build pyrolysis ovens and bury biochar, build solar concentrators and wind turbines, build desalination plants, use carbon-negative building techniques, etc. All this can be done with technologies and resources that already are locally available all around the world. Ensuring that countries have access to such information will make that they can develop without being dependent on supervision and imports from other countries. To help other countries obtain this information is as much in their interest as in our own interest.

President Obama, I plead to you, don't let polluters misinform you. Please show the kind of leadership that we all expect from you and reject a global cap-and-trade scheme -- instead, unite the world into a commitment to come together annually to set a percentage by which each country should reduce greenhouse gases.

While the premise to unite the world may sound simple, we are aware that the challenges will be huge and exhausting. Please keep your strength in the confidence that the whole world, our children and our children's children will thank you for this!

Sam Carana


References:

Energy and the Environment
http://www.whitehouse.gov/agenda/energy_and_environment/

UN Climate Change Conference, Copenhagen, Denmark, December 9 - 18, 2009
http://en.cop15.dk/

How Meat Contributes to Global Warming
http://www.sciam.com/article.cfm?id=the-greenhouse-hamburger

The Feebate Network
http://feebate.net

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Wednesday, September 24, 2008

Global warming calls for global commitment and local action

Emission trading will not work!

We should recognize that a global emission trading scheme will only sabotage real efforts to reduce emissions. It's a scheme designed by neocons and polluting industries, who aren't interested in reducing emissions, but who seek to exploit the situation in order to sell nuclear plants to developing countries, which will have to be paid for with emission credits that will in turn let polluters in developed countries off the hook. The neocons see this as an opportunity to send troops abroad to supervise operation of plants and shipments of uranium, nuclear waste, etc. It's a recipe for dictatorship and for global economic, social and environmental disaster.

Global commitment, local action


Instead, we should reach a international agreement that makes more sense, and we should reach this agreement soon, at the latest in Copenhagen in 2009. This agreement should merely set binding annual reduction targets that each country should meet. This agreement should let decisions how to achieve those targets be taken locally, while preparing for trade sanctions against those who fail to reach their targets.

It should be left to local communities to each decide on the technicalities of how to reduce their emissions. After all, conditions differ from place to place; some technologies will work better in one area than in another area. There are many ways to, say, produce clean and safe energy; wind turbines may be attractive in some areas, solar energy may become more prominent elsewhere, while yet another area may predominantly exploit geothermal power; many areas may also prefer to import electricity. Similarly, hydrogen may well become the dominant way to power ships, while cars will predominantly drive on battery power in future.

What policies work best?

Meanwhile, we should be discussing what are the most effective policy instruments to both discourage sales of products that cause emissions and encourage sales of better alternatives.

Feebates are most effective


A framework of feebates is in my view most effective, each with fees imposed on a specific type of product and with proceeds in each case used to fund rebates on local supply of better alternatives. Such a feebate policy only needs to insist that alternatives are clean and safe - market mechanisms can best sort out what works best where.

A framework of feebates is the most effective way to facilitate reductions, because feebates have a double impact, in that they impose a fee on whatever needs to be discouraged, while then using the proceeds of these fees to fund rebates on better alternatives. Market mechanisms can best sort out which products deserve to get rebates.

Different areas can implement feebates in different ways. This flexibility makes feebates attractive for areas with unique circumstances that make a universal policy less applicable. Feebates can target whatever product causes most emissions in the respective area and establish a shift to the better alternatives available in each area.

Feebates are budget-neutral - proceeds of fees can accumulate in a trust, thus creating a pool of money from where rebates can be paid on a first-come-first-go basis. If needed, the trust can take out loans to ensure early payment of rebates.

Implementing FeeBates

Feebates are most effective when applied locally, i.e. by using the proceeds of fees collected in an area to support the better alternatives that are supplied in that same area. That way, most money will be used to make changes where they are needed most.

Instead of prescribing a specific technology, a feebate policy should simply encourage better alternatives, e.g. by insisting that alternatives should be clean, safe and otherwise acceptable to the community. A good feebate policy will optimize market mechanisms and respect consumer choice, which will further increase the overall effectiveness of the policy and minimize bureaucratic overhead.

Fees are best calculated as a percentage added to the price of a product. Similarly, rebates are best calculated as a percentage of the sales price. This also increases the effectiveness of the policy by minimizing bureaucratic administrative overhead.

Fees can be initially low, say 10% of the sales price. Especially when alternatives still have little marketshare, such a 10% fee will create a huge pool of money from where rebates can be funded. Rebates can then be high, say 50% or even more, to facilitate a gradual but swift shift to better alternatives. Once the shift takes place, percentages could change, i.e. fees could be increased, while rebates could decrease. This way, the feebate will phase itself out as the shift eventuates.

Proposed FeeBates

Over the years, I have proposed a number of feebates, including:

- a 10% fee on sales of new gasoline cars, with rebates on local sales of zero emission vehicles;
- a 10% fee on sales of fossil fuel, with rebates on purchase and installation of local facilities that produce energy in safe and clean ways;
- a 10% fee on sales of building and construction work that uses polluting concrete (i.e. that contributes to global warming), with rebates on local purchases of clean concrete;
- a 10% fee on sales of fertilizers, with rebates on local sales of agrichar (or biochar); and
- a 10% fee on sales of meat, with rebates and vouchers on vegan-organic meals served in local restaurants.


Sunday, February 24, 2008

The Distributed Grid

Electric vehicles can cut greenhouse gas emissions in two ways. They are clean and efficient. By acting as storage capacity, they can also make the electric grid more efficient.

Electric cars are also cheap to drive and to maintain, and they don't make much noise. They still are relatively expensive to buy, but automated production and economies of scale can overcome this hurdle and make electric vehicles cheaper than gasoline cars.

If the electricity came from coal-fired power plants, driving an electric car still causes less greenhouse emissions than driving a gasoline car. Electric cars have zero emissions and are also more efficient. Thermal efficiency of power plants is higher than the thermal efficiency of most gasoline cars. Much of the fuel burned in gasoline cars turns into heat. Electric cars use regenerative breaking and do not use their motors when waiting before traffic lights. Electric cars use energy more efficiently, especially in city traffic that causes most of the emissions.

Impact on the grid - Running our entire fleet of vehicles on electricity instead of oil would not put much stress on the electric grid. One study concludes that if we transformed our entire fleet of vehicles into electric vehicles, they would jointly consume only 20% of grid capacity.

We wouldn't even need much expansion of the grid in terms of extra capacity or transmission lines. The majority of vehicles could run on the idle capacity that is available in the existing grid. One study concludes that there is sufficient idle capacity in the grid to power 73% of light vehicles, i.e. cars, SUVs, pickup trucks, and vans, without adding generation or transmission.

Moreover, such a move would benefit the grid. Car batteries can contain many times more power than what cars need for their average daily travel. Cheap off-peak rates would make it financially attractive to charge batteries at off-peak times, over and above what the individual user consumed during the day. The surplus can then be fed back into the grid to help out with high demand at peak times. Net-metering at good rates could make this attractive, while the grid becomes more efficient, more reliable and less prone to outages and glitches.

New batteries for electric cars are light, safe and do not harm the environment. Batteries are on the market now that allow electric cars to drive for hours without recharging. While these batteries are still expensive - they can cost over $10,000 - and are hard to get, mass production can overcome these hurdles.

Most cars only drive short distances. Recharging them at home and/or at work would suffice in most cases. In case they needed extra power to travel longer distances, their batteries could also be recharged at other locations with the required outlets, e.g. gas stations, parking buildings or parking meters. New batteries are now on the market that can be recharged in minutes, they can last for over a decade and can be recharged thousands of times without degeneration. This would make recharging convenient and safe, compared to filling a car with gas.

We don't all need to buy new cars. Many existing vehicles can be converted into electric vehicles. With some financial assistance, the conversion cost can pay itself back over time through savings on the cost of driving and maintenance. For those who cannot afford to buy a new electric car, there are also initiatives such as Project Better Place that plans to offer electric cars at a cheap price, while making profits on services such as car maintenance, battery upgrades and recharging the batteries. In an effort to offset the company's greenhouse gas footprint, employers may also contribute through leasing arrangements and by making recharging facilities available at work.

Renewable energy looks set to become the dominant supplier of energy. Wind turbines are being installed around the world. This will increase the amount of surplus energy in the grid at night. Storing this surplus energy in the batteries of electric cars will increase overall efficiencies.

Owners of electric cars will consume more electricity (but no gasoline) and are more likely to get solar panels, for the savings as well as to help the environment. Similarly, as more of their staff start driving electric cars, businesses will be more inclined to get solar panels on the roofs of their buildings and car parking facilities.

Solar facilities typically include a battery. Car batteries could be used instead. Most cars are parked at home when people switch on their lights, air-conditioners and TV-sets. Similarly, the power needs at work coincide with cars of staff being parked there. Using the batteries of electric cars to store electricity can reduce the need for batteries in solar facilities and will thus reduce the overall cost of solar facilities.

Cost of solar power has come down over the years. As an example, Nanasolar now offers thin film material at under $1 per watt. This promises clean and safe energy that is price-competitive with power plants. It also becomes increasingly attractive for households and businesses to install solar facilities. Recognising the market opportunities and the financial incentives made available at different levels of government, there now are numerous companies offering to help people adopt green energy at home without having to make large investments, sometimes even without any upfront payments.

A FeeBate Policy can help facilitate the switch to zero emission vehicles and to clean and safe ways to produce energy. A FeeBate policy can include fees on gasoline cars, with the proceeds used for rebates on zero emission vehicles. A FeeBate policy can also include fees on fossil fuel, with the proceeds used for rebates on clean and safe alternatives, such as wind and solar facilities.

In conclusion, all this will lead to a more distributed grid, with numerous suppliers and with numerous places where electricity is stored. The grid now draws electricity from a relatively small number of large power plants, to supply electricity in an area. Renewable energy supplies only a fraction of power, most of it through hydro facilities. The existing grid looks much like a broadcasting network, with a relatively small number of broadcasting stations sending content one-way to the public. In future, the grid looks set to become more distributed, with two-way connections to most users, much like a multitude of users can send and receive information over the Internet.



Friday, December 28, 2007

The FeeBate Debate

The best way to deal with global warming is a FeeBate policy. This works fast and effectively, is ideology- and budget-neutral and has the least risk of feeding a wasteful bureaucracy.

In essence, a Greenhouse Gases
FeeBate policy will impose a fee on products that cause emissions of greenhouse gases, while the proceeds of these fees will in each case be used to help better alternatives, in the form of rebates.

In many respects, markets are best suited to work out which products and technologies should get support through rebates - the main criteria should be that they are replacements for the item that attracted the fee, that they are safe and that they cause little or no emissions of greenhouse
gases, or - even better - that they are greenhouse gas negative.

The FeeBate policy should be adopted globally, but
executed locally; levels of fees and rebates can be adjusted on an annual basis, depending on how successfully the shift takes place. Fees can be collected on items that are sold locally, or - if necessary - fees can be imposed on imported items.

The FeeBate policy that I propose includes:
  • a fee of 10% on sales of new cars with internal combustion engines, with proceeds used to fund rebates for electric cars
  • a fee of 10% on sales of gasoline, with proceeds used to fund rebates on purchases and installation of facilities that produce renewable energy
  • a fee of 10% on sales of coal, with rebates given when electricity suppliers install facilities that produce electricity from renewable sources
  • a fee of 10% on building and construction work using concrete that contributes to global warming, with proceeds used to fund rebates on buildings that used clean concrete
  • a fee of 10% on sales of fertilizers, with rebates on sales of agrichar, which is produced by means of pyrolysis from various forms of biowaste
  • a fee of 10% on sales of meat, with rebates and vouchers for alternative food (my personal favorite: vegan-organic food served in restaurants in communities without roads)

Saturday, November 3, 2007

Wild Green Yonder

Boeing recently announced that it will have a hydrogen plane in the air later this year. The Boeing Fuel Cell Demonstrator Airplane is scheduled to fly at an altitude of about 2,000 feet (610 meters). The plane has a wing span of 16.3 meters (53.5 feet) and can fly at a speed of about 100 kilometers (62 miles) per hour.

The technology is identical to what is used in hydrogen cars such as the Ford HySeries, GM's HydroGen4 and Kia's 4×4 Fuel Cell Electric Vehicle, i.e. tanks holding hydrogen in the form of compressed gas, fuel cells, lithium-ion batteries and electric motors, in the case of this plane a single motor coupled to a conventional propeller.

Just like cars can (and already are) getting their electricity and hydrogen from the solar panels on top of parking lots, planes could similarly be powered from clean energy, such as from solar or wind power facilities in our backyards.

Boeing first announced the electric plane project in November 2001, when it said the first test flights could begin in early 2004. At the time, there was even speculation that the first flight would coincide with the celebrations of the 100th anniversary of the Wright Brothers first powered flight back in December 17th, 2003. Those plans have since been pushed back several times, but it now looks like it is finally going to happen.

Planes like this have the potential to reshape the face of the world. Imagine if we all used personal aircraft instead of cars. We no longer needed any roads, nor large, noisy airports. Instead we could use small airstrips to take off and land, perhaps in our backyards.

Communities without roads constitute a dramatic change in urban design. Houses could be smaller, as there's no need to put cars in garages. Without roads, houses could also be built much closer together - that in itself could reduce travel time. Simple pathways would be sufficient, connecting all such houses with a center comprising of shops, restaurants, medical specialists, lecture theaters, all within walking distance. Imagine the cost savings on cars, roads, bridges, tunnels, airports, railway tracks and railway stations, on gasoline and service stations. People could largely work from home and meet at facilities of the center closeby, resulting in further savings on office buildings and their car parking facilities.

There would also be huge time savings; given an abundance of small landing strips, planes could take us in a more direct line from one place to another, as opposed to the congested road system where cars line up for a multitude of traffic lights. GPS-navigation and radar technology could also result in a spectacular drop in traffic accidents; after all, there is much more space in the (three-dimensional) sky than on the (two-dimensional) ground.

To help such developments take off, we need to tax items that cause greenhouse gas emissions, such as fossil fuel, meat and fertilizers, with the tax proceeds going to local supply of better alternatives, such as solar and wind power, agrichar and vegan-organic food served in restaurants in communities without roads.


Please support our efforts to change the world and copy, post or email this article widely!


References:
Into the Wild Green Yonder - Boeing’s super-clean fuel-cell aircraft will create history this year with aviation’s first zero-emissions flight
http://www.boeing.com/news/frontiers/archive/2007/july/ts_sf06.pdf

Boeing's fuel cell-powered electric demonstrator airplane - August 2003
http://www.boeing.com/news/frontiers/archive/2003/august/i_atw.html

Boeing Announces Partners for Fuel Cell Demonstrator Airplane Project - July 11, 2003
http://www.boeing.com/news/releases/2003/q3/nr_030711p.html

The Hydrogen Economy - articles featured in this group
http://www.gather.com/viewArticles.jsp?filter=feature&grpId=3659174697249995&nav=Groupspace

Change the World - articles featured in this group
http://www.gather.com/viewArticles.jsp?filter=feature&grpId=3659174697250134&nav=Groupspace

Solar-Hydrogen Demo Project in Sacramento - by Steve B.
http://www.gather.com/viewArticle.jsp?articleId=281474977163811

Tax the sale of meat! - by Sam Carana
http://www.gather.com/viewArticle.jsp?articleId=281474977123673

Agrichar - by Sam Carana
http://www.gather.com/viewArticle.jsp?articleId=281474977155102

Communities without roads - by Sam Carana
http://www.gather.com/viewArticle.jsp?articleId=281474977128488

Wednesday, October 10, 2007

Agrichar

Most households only use one or at most two different rubbish bins, one for recyclables (paper & packaging) and one for general waste. It makes a lot of sense to add a third type of rubbish bin, for biowaste, i.e. kitchen waste, soil and garden waste.

Many people already compost such biowaste in the garden, but all too often such biowaste disappears along with the general waste in the rubbish bin. As displayed on the picture below, analysis in Waikato, New Zealand, shows that about half of household waste can consist of kitchen waste, soil and garden waste. Such waste ends up on rubbish tips, where the decomposing process leads to greenhouse gases, such as methane. And all too often, farmers burn crop residues on the land, resulting in huge emissions of greenhouse gases.

All such biowaste could deliver affordable energy by using the slow burning process of pyrolysis to produce agrichar or bio-char, a form of charcoal that is totally black. Organic material, when burnt with air, will normally turn into white ash, while the carbon contained in the biowaste goes up into the air as carbon dioxide (CO2). In case of pyrolysis, by contrast, biowaste is heated up while starved of oxygen, resulting in this black form of charcoal.

This agrichar was at first glance regarded as a useless byproduct when producing hydrogen from biowaste, but it is increasingly recognized for its qualities as a soil supplement. Agrichar makes the soil better retain water and nutrients for plants, thus reducing losses of nutrients and reducing the CO2 that goes out of the soil, while enhancing soil productivity and making it store more carbon.

When biowaste is normally added to soil, the carbon contained in crop residue, mulch and compost is likely to stay there for only two or three years. By contrast, the more stable carbon in agrichar can stay in the soil for hundreds of years. Adding agrichar just once could be equivalent to composting the same weight every year for decades.

Agrichar appears to be the best way to bury carbon in topsoil, resulting in soil restoration and improved agriculture. Agrichar has the potential to remove substantial amounts of CO2 from the atmosphere, as it both buries carbon in the soil and gets more CO2 out of the atmosphere through better growth of vegetation. Agrichar restores soils and increases fertility. It results in plants taking more CO2 out of the atmosphere, which ends up in the soil and in the vegetation. Agrichar feeds new life in the soil and increases respiration, leading to improvements in soil structure, specifically its capacity to retain water and nutrients. Agrichar makes the soil structure more porous, with lots of surface area for water and nutrients to hold onto, so that both water and nutrients are better retained in the soil.

In conclusion, recycling biowaste in the above way is an excellent method to produce hydrogen (e.g. for cars) and to bury carbon in the soil and improve production of food. Agrichar is now produced for soil enrichment at a growing number of places. The top photo shows agrichar in pellet form from Eprida. Australian-based BEST Energies has built a demonstration pyrolysis plant with a capacity to process 300 kilograms of biowaste per hour. It accepts biowaste such as dry green waste, wood waste, rice hulls, cow and poultry manure or paper mill waste. The plant cooks the biomass without oxygen, producing syngas, a flammable mixture of carbon monoxide and hydrogen. The agrichar thus produced retains about half the carbon of the original biowaste (the other half was burned in the process of producing the syngas).

Also important is to compare different farming practices. Carbon is important for holding the soil together. Farmers now typically plough the soil to plant the seeds and add fertilizers. This ploughing causes oxygen to mix with the carbon in the soil, resulting in oxidation, which releases CO2 into the atmosphere. Ploughing leads to a looser soil structure, prone to erosion under the destructive impact of heavy rains, flooding, thunderstorms, wind and animal traffic. Given the more extreme weather that can be expected due to global warming, we should reconsider practices such as ploughing.

Furthermore, the huge monocultures of modern farming have become dependent on fertilizers and pesticides. The separation of farming and urban areas has in part become necessary due to the practice of spraying chemicals and pesticides. Instead, we should consider growing more food on smaller-scale farms, in gardens and greenhouses within areas currently designated for urban usage. Vegan-organic farming can increase bio-diversity; by carefully selecting complementary vegetation to grow close together, diseases and pests can be minimized while the nutritial value, taste and other qualities of the food can be increased.

An issue of growing concern is nitrous oxide (N2O), which is 310 times more potent than CO2 as a greenhouse gas when released in the atmosphere. Much release of N2O is related to the practices of ploughing and adding fertilizers to the soil. Microbes subsequently convert the nitrogen in these fertilisers into N2O. A recent study led by Nobel prize-winning chemist Paul Crutzen indicates that the current ways of growing and burning biofuel actually raise rather than lower greenhouse gas emissions. The study concludes that growing some of the most commonly used biofuel crops (rapeseed biodiesel and corn bioethanol) releases twice the amount of N2O, compared to what the International Panel on Climate Change (IPCC) estimates for farming. The findings follow a recent OECD report that concluded that growing biofuel crops threatens to cause food shortages and damage biodiversity, with only limted benefits in terms of global warming.

All this is no trivial matter. Soils contain more carbon than all vegetation and the atmosphere combined. Therefore, soil is the obvious place to look at when trying to solve problems associated with global warming. By changing agricultural practices, we can add carbon to the soil and can minimize release of greenhouse gases.

References:
- Soils offer new hope as carbon sink
http://www.dpi.nsw.gov.au/research/updates/issues/may-2007/soils-offer-new-hope/

- Surprise: less oxygen could be just the trick
http://tinyurl.com/ywalt4

- What we throw away
http://www.waikato.govt.nz/enviroinfo/waste/whatwethrowaway.htm

- The Carbon Farmers
http://www.abc.net.au/science/features/soilcarbon/

- Living Soil
http://www.championtrees.org/topsoil/

- BEST Pyrolysis, Inc.
http://www.bestenergies.com/companies/bestpyrolysis.html

- Eprida, Inc.
http://eprida.com/hydro/

- Biofuels could boost global warming, finds study
http://www.rsc.org/chemistryworld/News/2007/September/21090701.asp

- Biofuels: is the cure worse than the disease?
http://tinyurl.com/yq9t8o

More Wind Power!

Globally, wind power generation more than quadrupled between 2000 and 2006. But while wind power is making steady progress in Europe, the U.S. gets less than 1% of its electricity from wind power,

Spain now gets 9% percent of its electricity from wind power, with turbines generating 44% of electricity in the province of Navarra. In Germany turbines generate 7% of electricity, 36% in the coastal state of Sleswig-Holstein. In Denmark, wind turbines produced an average of 18.5% of electricity in 2004. Denmark aims to have 50% of its electricity demand supplied by wind turbines in 2025.

So, are the Danes wrong, or is the US public being fed the wrong ideas? Those with vested interests in the status quo have gone to extraordinary lengths to fabricate arguments against clean technologies such as hydrogen and wind power. They claim that wind power was unreliable as the wind does not blow continuously. Indeed, the contribution of wind power fluctuates with the wind, so when it is windy, the contribution of wind power can increase. On September 15th, a particularly windy day, wind turbines accounted for 70% of Denmark's electricity measured around midday. On windy nights, Denmark transfers excess electricity along interconnected grids into Germany and Sweden.

Wind power works best in combination with other technologies, such as solar and hydro-power. Furthermore, electricity can be stored in many ways, such as by pumping water back uphill. Do wind turbines make too much noise? Virtually noiseless systems can be installed in your backyard. Storage of water, heat and electricity can result in huge savings. For household hot water usage, there are low-tech thermal solar systems that heat up domestic water tanks, requiring no electricity. Many other 'low-tech' alternatives are being tested for use in developing countries, such as flywheels, springs and weights. Mobile phone and other electronic devices can be powered by hand cranks.

Using more advanced technologies, electricity from wind turbines can be stored by compressing or heating substances in tanks. One of the most promising ways to store surplus wind power is by producing hydrogen. Hydrogen can be stored under pressure in tanks, to provide fuel for industrial or domestic use or in cars, all without creating pollution. As discussed in more detail in an earlier article, electric vehicles can also run on Lithium-ion batteries that can be recharged from the solar panels on top of the roofs under which they are parked.

Anyway, more electric cars means that we need to generate more electricity, and wind power is one of the easiest and cleanest ways to do so. We can choose the times when best to recharge the batteries or produce the necessary hydrogen, so we can do so when it's windy and when there's little further demand, so it will take little or no electricity away from other usage. Look at it this way and claims that wind power was unreliable and that hydrogen was inefficient do not hold.

Once you look at the wider picture of a mix of technologies, the 'problems' that opponents of wind energy and hydrogen like to bring up will quickly evaporate. Similarly, many perceived problems are purely the result of the way the power grid is currently organized. A more distributed and intelligent system will allow a multitude of points to act as suppliers, with net-metering allowing households to earn money for feeding surplus electricity from their wind turbines back into the grid.

Oh, and do wind turbines kill birds? Does nuclear radiation kill birds? A recently completed Danish study using infrared monitoring found that seabirds steer clear of offshore wind turbines and are remarkably adept at avoiding the rotors.

Wind power does deserve more attention and should get more marketshare, while the share of fossil fuel should be reduced. The quickest and most effective way to achieve this is by taxing fossil fuel and using the proceeds to subsidize supply of wind power and other clean and renewable alternatives.

References:

- 50% Wind Power in Denmark in 2025
- On a windy night, Denmark exports elctricity
- European wind power companies grow in U.S.
- Wind power
- Massive Offshore Wind Turbines Safe for Birds
- Solar power and electric cars, a winning combination!
- Tax greenhouse gas emissions!

Communities without Roads

Posted at Gather on September 26, 2007.

Communities without roads is an exciting concept that allows people to live within walking distances of colleages, customers, friends, medical and educational facilities, shops, restaurants, etc. The sedentary lifestyle of many people is a result of the way cities are currently designed. Instead, we should facilitate the opposite, i.e. people coming out of their houses, offices, and especially their cars, in order to meet other people, getting better food and becoming more healthy in the process.

The car has come to dominate the urban landscape, resulting in a metropolitan conglomeration of suburbs, stringed together along highways. Our most fertile land is now used for roads and cars, and the industries needed to support them. About half the urban area is for buildings, mainly three-bedroom homes on small blocks of land. The other half is used for roads, parks and grassland between roads. A large part of roads, buildings and gardens is also used to park cars.

Ever less fertile land is available food. Global warming forces us to rethink all this. As prices of oil skyrocket, more land is being dedicated to grow bio-fuel, resulting in less land available for food. Also, more extreme weather conditions can be expected, resulting in increasing crop loss.

We need more land to grow fruit and vegetables, in ways as was once the case in traditional gardens and on smaller farms. One place to find such land is by converting roads and office blocks into gardens. This doesn't mean a return to those ‘good-old-days’ of small towns and villages. Instead, we should consider an entirely new type of urban design: communities without roads. Technological progress is not the enemy here. Better security and communication systems can help get such communities off the ground. Electric vehicles can be instrumental in getting such communities off the ground.

What I propose are communities with footpaths and bike-paths instead of roads. Houses would be built close together, around a local center of shops and restaurants. In communities without roads, houses could be smaller, since there's no need to park cars in front or in garages. Building houses close together itself reduces travel distances between them. Pathways to a nearby center could suffice for further daily travel, leading to shops, markets, restaurants, lecture and meeting rooms.

In such a center, people would conveniently eat in restaurants, without traffic and parking hassle and noise - just a short stroll by foot or ride on a bike or in an electric scooter. Eating out means less shopping, since food makes up most of our shopping. It also saves a lot of time - no more shopping, cooking, dishwashing and cleaning, no rubbish to get rid of. Walking more would be good for our health as well.

Living closer together means people could see each other more often, both at home or at such a nearby restaurant. Why travel to an office or University, when you can work or follow courses online? Homeschooling has long proven to be much more effective than school. Why should people be institutionalized, kids packed away into school, the elderly people into ‘homes’ and the sick in hospitals? Instead, we should encourage families to stay together as much as possible and as long as possible in communities without roads.

This would result in huge savings on the current cost of cars, roads, office buildings, car parks, garages, gasoline stations, etc. How much time and money could we save by reducing our daily travel between home and work? And how many lives would be saved if we had less car-accidents? Because of the shared walls between them, townhouses save on the cost of heating in winter and cooling in summer.

To start it off, a University campus could be transformed into a community without roads, where people live and come to learn and work. Anyone who would like to nominate one?

Communities without Roads

Extract from a post by Libertaria, January 23, 2005. 

Have a look at the Segway and imagine it - communities without roads! Instead of driving a car, just walk to your local restaurants or meeting places. Also have a look at the iBot which is great for people who need wheelchairs - because it can climb stairs it gives easy access to many places. How about letting everyone who needed it use an iBot, instead of pouring money into improving wheelchair access to buildings?

Think about it! About half the urban area is taken up by roads and greenstrips between roads. A substantial part of roads, buildings and gardens is also used to park cars. Without cars and roads, we could live closer together; that would be great for people who complement each other in one way or another; they could live closer to each other and see each other more often. Instead of working in an office, we could do most things from home. In fact, you could work anywhere. The cell-phone motto appears to be: anything, anywhere, anytime! The same goes for learning. Why go to University, when you can follow courses online? Homeschooling has long proven to be much more effective than school.

In communities without roads, urban design could be changed dramatically! Houses could be smaller, as there's no need to put cars in garages. Without roads, houses could also be built much closer together - that in itself could reduce travel time. Simple pathways would be sufficient! Imagine it: communities without roads, bridges, tunnels, airports, railway tracks and railway stations! Such a new lifestyle could result in huge savings on cars, roads, office buildings, car-parks, garages, petrol stations, etc. How much time and money could we save by reducing our daily travel between home and work? And how many lives would be saved if we had less car-accidents?

Security systems can further help avoiding hostilities between people. Solar-powered motion sensors can trigger floodlights and alarms, which in combination with cameras can enhance security and lower health risks. Why not use satellites and interconnected WiFi LANs, instead of Cable-TV and phone lines? Mobile phones and GPS-technology can make great contributions towards our safety and security. All such devices need ever less power, while new technologies extend the usage-time of rechargeable batteries. If we used more GPS-enabled devices, motion detectors and surveillence cameras, we could increase safety and security in and around the home, thus requiring less emergency services.

Currently, the most fertile land is taken for urban use, most of it for roads and gardens (with grass as the dominant crop). With more land available for hobby farming, growing fruit and vegetables could be cheaper and the cost of food could come down dramatically. In a new urban design, houses could be built around restaurants and meeting places. People can more easily go out to eat in restaurants, because there's no traffic and parking hassle, it's just a short stroll or ride on the Segway instead. Many restaurants have embraced wireless services, so take a notebook with you and you're really connected for a business lunch! Or, take a Tablet PC and use a stylus to scribble down your notes and share them! Eating out means less shopping, since food makes up most of our shopping. It also saves a lot of time - no more shopping, cooking, dishwashing and cleaning, no rubbish to get rid of. 
Related comments posted earlier
Libertaria - Communities without roads - January 23, 2005 

Perhaps such communities could be built as a University campus, an old-folks resort or holiday retreat, where people could came to visit and have an apartment or second home or so. It will have to be in a nice climate, because if it's too cold or rainy, people will want to use cars. Deserts are therefore good places to start up such communities, there's also a need to preserve water, there's plenty of sun for solar energy and there's no urban infrastructure to start with as it's so remote. 
Deborah - Communities without roads - January 24, 2005 

I think we should seriously consider banning all cars that create pollution and greenhouse gasses. Furthermore, we'll need to look at alternatives to burning coal to generate electricity. We need to look at alternative ways to generate energy. 
Sam Carana - Communities without roads - January 27, 2005 

Banning cars doesn't necessarily mean prohibiting them legally. Simply putting up "no access"-signs would still require police, courts, fines, even prisons. That means extra cost and trouble, which could indeed be politically unacceptable. Cars could instead be banned by default, e.g. people could decide to stop using cars if they became too expensive, compared to alternatives. Or, people could decide to stop using cars because of the environmental damage. What I like about the idea of Communities without Roads is that cars can effectively be banned (from the inner community) by designing communities without roads. Building houses closer together effectively keeps cars out without the need for police, etc. 

It's done before in the inner city where cars are banned from the main shopping street, which is turned into a pedestrian-only area, if necessary by putting up poles. The same for shopping malls, university campus, festivals, etc. Some area definitely see an economic and social benefit in keeping out cars altogether. Instead of applying this to a small area only, we should look at applying it to entire communities. 
Sam Carana - Communities without roads - January 28, 2005 

[We should] plan communities without roads and with footpaths and bikepaths instead. Plan houses close together, around a local center of shops and restaurants. Redesign existing cities so that people have to travel less. 
Sam Carana - Ten Recommendations to deal with global warming - April 8, 2007 

We should start building such communities without roads on university campuses, designing small houses for staff and students to live around shops and restaurants. Small houses need less heating and air-conditioning. If we leave out roads, garages and other car-parking spaces, they can be built closely together, so anyone can easily walk or bike their way around. That would be more healthy as well! 
Sam Carana - Ten Recommendations to deal with global warming - April 9, 2007 

I propose one tax specifically on supply of energy that adds extra heat. What I want to avoid is that the proceeds of this tax go back to the polluter, e.g. in the form of tax deductions or subsidies for capture and sequestration. Also, I don't want the proceeds to be used to subsidize higher energy bills of the poor, as that would defeat its purpose - after all, if the rich can afford to pay the tax and if the proceeds help to poor to pay higher bills, then there will be little or no benefits in terms of global warming. Therefore, I propose that proceeds of this tax will be used exclusively to subsidize supply of energy that doesn't add extra heat. 

Furthermore, I propose a tax on sales of meat. This tax should be used to support environmentally-friendly developments, such as communities without roads. I propose communities without roads and with footpaths and bikepaths instead. Houses would be built close together, around a local center of shops and restaurants. Existing cities could be redesigned so that people have to travel less. The tax on the sales of meat could be used to create such communities, e.g. by supporting vegetarian restaurants, bicycle shops and other environmentally-friendly outlets in such communities. Anyway, such communities could incorporate wind turbines and devices like Klaus Lackner's artificial trees, in which case they could be supported by proceeds of the tax on meat.

We should seriously reconsider public transport, in fact, we should look at redesigning the entire way cities are built. Many people go by car to the railway station, because they live too far from the station to walk. Look at how many cars are parked around any suburban railway station! All the space needed for car parking further isolates railway stations from the houses around them, just like railway tracks and highways cut up communities into isolated parts. 

Already now, a taxi can be much more efficient than public transport, since buses and trains follow a set route, stopping only at set points. Many buses and trains remain virtually empty at off-peak hours, consuming huge amounts of energy in vain. Many people avoid public transport for the long waiting in inhospitable environments with high crime risks and lack of service. If taxi services were deregulated, there would be far less need for public transport. 
The idea of communities without roads is that there is very little need for public transport, but it doesn't mean that people are locked up inside their homes. Terms like homeschooling and working from home may give that false impression. In fact, most homeschoolers I know love to go out (e.g. to see other homeschoolers) and they are more outdoors than kids who go to school. Similarly, working from home means that one spends less time commuting, time that can be spent at exhibitions, conferences, in restaurants, shops, etc. New technology more and more allows people to work when and where they want, while greater efficiencies mean that one can achieve more results in less time.
Also, many people are currently locked up inside their homes because they have nowhere to go. This is especially a problem for elderly people who are afraid to drive a car and who are afraid to walk the empty streets in the suburbs. Town planners have designed urban nightmares, with most activities centralised in specialized buildings, e.g. medical care and education preserved for schools and hospitals. Shopping is concentrated in malls and most offices are centralized in the CBD of each city. This kind of design and zoning results in suburbs stretching out further and further along railway lines that bring people daily into the city. Suburban houses are occupied by few people during the day, people literally go there to sleep.
Communities without roads is an exciting concept that allows people to live within walking distances of colleagues, customers, friends, medical and educational facilities, shops, restaurants, etc. Again, this doesn't mean people are to be locked up inside. The sedentary lifestyle of many people is a result of the way cities are currently designed. Instead, we should facilitate the opposite, i.e. people coming out of their houses, offices, etc, meeting other people, getting more healthy food and becoming fitter.
Sam Carana - Ten Recommendations to deal with global warming - April 28, 2007  
The car has come to dominate the urban landscape, resulting in a metropolitan conglomeration of suburbs, stringed together along highways. Our most fertile land is now used for roads and cars, and the industries needed to support them. About half the urban area is for buildings, mainly three-bedroom homes on small blocks of land. The other half is used for roads, parks and grassland between roads. A large part of roads, buildings and gardens is also used to park cars.
Ever less fertile land is available food. Global warming forces us to rethink all this. As prices of oil skyrocket, more land is being dedicated to grow bio-fuel, resulting in less land available for food. Also, more extreme weather conditions can be expected, resulting in increasing crop loss.
We need more land to grow fruit and vegetables, in ways as was once the case in traditional gardens and on smaller farms. One place to find such land is by converting roads and office blocks into gardens. This doesn't mean a return to those ‘good-old-days’ of small towns and villages. Instead, we should consider an entirely new type of urban design: communities without roads. Technological progress is not the enemy here. Better security and communication systems can help get such communities off the ground. Electric vehicles can be instrumental in getting such communities off the ground.
What I propose are communities with footpaths and bike-paths instead of roads. Houses would be built close together, around a local center of shops and restaurants. In communities without roads, houses could be smaller, since there's no need to park cars in front or in garages. Building houses close together itself reduces travel distances between them. Pathways to a nearby center could suffice for further daily travel, leading to shops, markets, restaurants, lecture and meeting rooms. 
In such a center, people would conveniently eat in restaurants, without traffic and parking hassle and noise - just a short stroll by foot or ride on a bike or in an electric scooter. Eating out means less shopping, since food makes up most of our shopping. It also saves a lot of time - no more shopping, cooking, dishwashing and cleaning, no rubbish to get rid of. Walking more would be good for our health as well.
Living closer together means people could see each other more often, both at home or at such a nearby restaurant. Why travel to an office or University, when you can work or follow courses online? Homeschooling has long proven to be much more effective than school. Why should people be institutionalized, kids packed away into school, the elderly people into ‘homes’ and the sick in hospitals? Instead, we should encourage families to stay together as much as possible and as long as possible in communities without roads.
This would result in huge savings on the current cost of cars, roads, office buildings, car parks, garages, gasoline stations, etc. How much time and money could we save by reducing our daily travel between home and work? And how many lives would be saved if we had less car-accidents? Because of the shared walls between them, townhouses save on the cost of heating in winter and cooling in summer.
To start it off, a University campus could be transformed into a community without roads, where people live and come to learn and work. Anyone who would like to nominate one?
Sam Carana - Communities without roads - September 26, 2007
The sprawling suburbs syndrom: daily commuting for more than an hour, neighborhoods without pedestrians and neighbors who don't know each other, yet who try to outdo each other regarding the number of bedrooms and toilets in their mansions and the number of cars that fit inside their garages, while in between the concreted driveways the dominant crop is grass.

Instead, a few thousand people could each have most of the facilities they need close by, i.e. within walking distance from where they live. People who wanted to could have gardens and grow fruit and vegetables, to be sold at markets in the local center. Such centers could cater for a few thousand people who live around such a center, with distances short enough for everyone to be able to walk or use bicycles or scooters, without needing any roads. Indeed, the absence of raods and cars makes that people can live close together. Yet, those centers could be interconnected by road, rail, boat or plane. Visiting another center would be quite different from the daily commuting we see now happen. Many people now sit in the car for more than an hour daily, to go to work, to do shopping, for meals and entertainment. Life very much evolves around cars and roads.

The way cities and suburbs have grown isn't the result of some natural law of urban growth, James, but it's the result of some very specific planning based on principles that now look pretty much outdated in many respects. There's nothing wrong with reconsidering those principles, James, and to try out some new configurations and designs that could work much better in the light of peak oil, health and obesity, social coherence, demographic changes, etc, etc, and of course global warming with all its consequences that are yet to make their full impact.
Sam Carana - comment to: Communities without roads - October 11, 2007