Can’t Afford Solar? Paint It White

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B9a_agra700.jpg Your roof, that is. A new study calculates that installing white roofs in the world’s cities could offset 1.5 years of manmade carbon emissions, reports AAAS.

Light-colored roofs cool the planet in two ways. They reflect radiation back into space. And they keep your house cooler so you use less air conditioning.

Researchers from Lawrence Berkeley National Laboratory and the state of California estimated the global number of roofs and asphalt surfaces in cities and conservatively estimated they comprise 1 percent of Earth’s surface. They then found that using light-colored concrete, or applying white glazes to buildings, could increase the reflectivity of urban surfaces by 10 percent, effectively negating 44 gigatons of CO2. In comparison, halting deforestation of tropical forests would eliminate about 7 gigatons of emissions.

Total global annual emissions from fossil fuels are currently running at about 28 gigatons.

The new snow: paint.

Julia Whitty is Mother Jones’ environmental correspondent, lecturer, and 2008 winner of the Kiriyama Prize and the John Burroughs Medal Award.

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Fact:

In-depth journalism that investigates the powerful takes real money and is so damn important right now.But it doesn’t take a Mother Jones investigation to know that billionaires and corporations will never fund the type of reporting (like they do politicians) we do that exists to help bring about change. Instead, our mission-driven journalism is made possible by people power, and has been for 46 years now since our founding as a non-profit.

In “TITLE TK” Monica Bauerlein writes about the perilous moment we’re in, and why it’s so important that we raise $325,000 by the time November’s midterms are decided so we can be ready to throw everything we have at the big issues facing the nation no matter what happens. Please help MoJo’s people-powered journalism with a donation today.

$400,000 to go!

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