Can’t Afford Solar? Paint It White

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.


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.

THE END...

of our fiscal year is Thursday, June 30, and we have a much larger fundraising gap than we can easily manage with only days left to go.

Right now is no time to come up short: If you value the hard-hitting, democracy-protecting, justice-advancing journalism you get from Mother Jones, please help us keep charging as hard as we possibly can with a much-needed and much-appreciated donation today.

payment methods

THE END...

of our fiscal year is Thursday, June 30, and we have a much larger fundraising gap than we can easily manage with only days left to go.

Right now is no time to come up short: If you value the hard-hitting, democracy-protecting, justice-advancing journalism you get from Mother Jones, please help us keep charging as hard as we possibly can with a much-needed and much-appreciated donation today.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate