Eco20/20

The value consumers place on goods and services often is a matter of simple economics. When demand is high and supply low, relative worth heads north. This fundamental truth from our friend Adam Smith couldn't be more relevant to the car business these days. Visit any dealership and ask how many thousands of dollars in incentives are available on trucks and SUVs collecting dust on the lot. On the flip side, the Prius hybrid's massive worldwide appeal is not only a sign of our energy-afflicted times but proof of what happens when there are more shoppers than cars.

Wind supplied more of Britain's electricity that water for the first time last year, while power generators preferred gas to coal and nuclear output continued to decline, according to new government data. Five percent of Britain's electricity came from renewable sources in 2007, up from 4.6 percent in 2006, as more wind farms started feeding clean electricity into the network, helping cut the country's carbon emissions.

Light-emitting diodes (LEDs) are better than compact fluorescent bulbs--LEDs use less energy, last longer, and contain no toxic mercury--but for general white-light illumination, they're still far too expensive for mass adoption. Now, researchers at Purdue University have taken a step toward making white LEDs with cheaper materials.

When the tobacco industry was feeling the heat from scientists who showed that smoking caused cancer, it took decisive action. It engaged in a decades-long public relations campaign to undermine the medical research and discredit the scientists. The aim was not to prove tobacco harmless but to cast doubt on the science.

The first meeting of the International Agrichar Initiative convened about 100 scientists, policymakers, farmers and investors with the goal of birthing an entire new industry to produce a biofuel that goes beyond carbon neutral and is actually carbon negative. The industry could provide a "wedge" of carbon reduction amounting to a minimum of ten percent of world emissions and possibly much more.

U.S. Department of Energy (DOE) Deputy Assistant Secretary for Energy Efficiency David Rodgers today announced the launch of DOE's Zero-Net Energy Commercial Building Initiative (CBI) with establishment of the National Laboratory Collaborative on Building Technologies Collaborative (NLCBT). These two efforts both focus on DOE's ongoing efforts to develop marketable Zero-Net Energy Commercial Buildings, buildings that use cutting-edge efficiency technologies and on-site renewable energy generation to offset their energy use from the electricity grid by 2025.

Understanding wind energy can be a challenge. But it is no more complicated than the choices we are making on transportation. And just like those choices, wind is great for Pennsylvania's economy as well as our environment. Pennsylvania wind farms generate power about 70 percent of the time. But the amount of power is variable. That's why it is rated at 30 percent of capacity. It's like having a car that can go 100 mph but your average speed is much less.

Winds rush through the capital city of China, blowing dust storms that envelop it in grit from the encroaching Gobi Desert each spring. Last year, the government finally took advantage of those winds, installing 33 wind turbines manufactured by domestic company Xinjiang Gold Wind at the Guanting wind power field to harvest this energy and use it to supplement the electricity provided by polluting coal. Those suburban turbines began turning in earnest on January 20, providing 35 million kilowatt-hours of electricity to Beijing through July, or roughly 300,000 kilowatt-hours a day.

As the United States grapples for ways to break its dependence on foreign energy sources, one tiny town in Missouri seems to have it figured out. Rock Port, in the northwest tip of the state, has been on the decline for decades, and its population dwindles each year. But a walk up to the old cemetery shows something that has put the wind, literally, back in the town's sails: four massive turbines.

The current energy crisis has made American voters look more favorably on a wide range of ideas that can be used to deal with our energy problems. But voters don't favor all of these ideas equally; they have clear views on which approaches they think will work best. Consider these data from a recent Quinnipiac University poll of voters in four key swing states: Colorado, Michigan, Minnesota, and Wisconsin.

Builder and author Shay Salomon finds that the happiest home builders are often the ones with the smallest houses. They're less costly to build and maintain, more likely to be finished, use fewer resources and help people simplify their lives. One version of "smaller" is to share a house, which can ease our loneliness while building our social network. Co-founder of the Small House Society, Shay notes that scaling down can enable a ratcheting up of our whole lifestyle, as we revalue quality over quantity. Declaring "Enough", she says, is the most ecological thing one can do.

CAMBRIDGE, Massachusetts (Reuters) - A U.S. scientist has developed a new way of powering fuel cells that could make it practical for home owners to store solar energy and produce electricity to run lights and appliances at night. A new catalyst produces the oxygen and hydrogen that fuel cells use to generate electricity, while using far less energy than current methods.

As soon as I have finished this column I will jump on the train to Kent. Last year Al Gore remarked: "I can't understand why there aren't rings of young people blocking bulldozers and preventing them from constructing coal-fired power plants." Like hundreds of honorary young people, I am casting my Zimmer frame aside to answer the call. Everything now hinges on stopping coal. Whether we prevent runaway climate change largely depends on whether we keep using the most carbon-intensive fossil fuel. Unless we either leave it - or the carbon dioxide it produces - in the ground, human development will start spiralling backwards. The more coal is burnt, the smaller are our chances of future comfort and prosperity. The industrial revolution has gone into reverse.