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Posted By E.B. Boyd On June 10, 2009 @ 2:56 pm In Green Living | No Comments
People who live in hot climates without air conditioning, like Greece or India, know that the key to keeping cool is to paint the roof — or, indeed, the whole building — a light color.
Turns out it could help counter global warming too. In London last month , Obama’s Secretary of Energy said painting roofs and roads light colors in urban areas could offset the impact of all the cars in the world for 11 years!
That comes on the heels of a report  by a Lawrence Berkeley Laboratory physicist last fall that said that if the 100 biggest cities in the world installed white roofs and changed their pavements to be more reflective, it would offset 44 metric gigatons of greenhouse gases — or more than all the countries in the world emit in a year.
The science is simple: Light colored surfaces reflect light back into space. Dark surfaces absorb heat. Not only does that turn your home into a swelter box, forcing you to use more energy for things like air conditioning. It also traps more heat here on Earth and contributes to global warming.
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URLs in this post:
 In London last month: http://www.telegraph.co.uk/earth/earthnews/5389278/Obamas-green-guru-calls-for-white-roofs.html
 a report: http://articles.latimes.com/2008/sep/10/local/me-roofs10
 incentives or rebates: http://life.gaiam.com/gaiam/p/Going-Green-Pays-Tax-Incentives-for-Eco-Choices.html
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