Renewable Energy

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Comment by Ecolocitizen on September 27, 2009 at 11:34am

Solar Power, Without All Those Panels

A section of roof tiles at this demonstration site — a home in Bermuda Dunes, Calif. — has built-in solar power cells. The job took about four hours, the owner said.

By ANNE EISENBERG
Published: New York Times, September 26, 2009

THE main way for homes to harness solar power today is through bulky panels added to the rooftop or mounted on the ground.

But companies are now offering alternatives to these fixed installations, in the less conspicuous form of shingles, tiles and other building materials that have photovoltaic cells sealed within them.

“The new materials are part of the building itself, not an addition, and they are taking photovoltaics to the next level — an aesthetic one,” said Alfonso Velosa III, a research director at Gartner and co-author of a coming report on the market for the new field, called building-integrated photovoltaics.

Companies are creating solar tiles and shingles in colors and shapes that fit in, for example, with the terra cotta tile roofing popular in the Southwest, or with the gray shingles of coastal saltbox cottages.
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Comment by Ecolocitizen on September 20, 2009 at 1:02pm

On Energy, We're Finally Walking the Walk
By Lester R. Brown
Published Washington Post, Sunday, September 20, 2009

The United States has entered a new energy era, ending a century of rising carbon emissions. As the U.S. delegation prepares for the international climate negotiations in Copenhagen in December, it does so from a surprisingly strong position, one based on a dramatic 9 percent drop in U.S. carbon emissions over the past two years and the promise of further huge reductions.

Prominent among these carbon-cutting initiatives are stronger automobile fuel-economy standards, appliance efficiency standards, and the potential to heat, cool and light buildings with carbon-free sources of electricity. On the supply side are efforts supporting the development of U.S. wind, solar and geothermal energy resources.

Even though part of this decline in carbon emissions was caused by the recession and higher gasoline prices, part of it came from gains in energy efficiency and shifts to carbon-free sources of energy, including record amounts of new wind-generating capacity. This impressive drop in carbon emissions should enable the United States to push for a steep cut in Copenhagen.

For a country where oil and coal use have been growing for more than a century, the fall since 2007 is startling. Last year, oil use dropped 5 percent, coal 1 percent and overall carbon emissions 3 percent. Projections for this year, based on Energy Department data for the first eight months, show oil use down by an additional 5 percent. Coal is estimated to fall by 10 percent. Altogether, carbon emissions from burning fossil fuels, including natural gas, dropped 9 percent over the two years.
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