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Is white--or green--the new black in cities?
How effective are white roofs in cities? Scientists are finding new and surprising answers.
Credit: lbl.gov
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Cities produce what's known as the urban heat island effect: It's significantly warmer there.
Credit: U.S. EPA
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Researchers have found an important seasonal contrast in cooling by green roofs and white roofs.
Credit: U.S. EPA
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White roofs dot an aerial view of Queens, N.Y.
Credit: NASA
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Painters work to turn a Washington, D.C., roof a light-reflecting white.
Credit: AGU
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