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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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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