High-tech rooftop mirrors bounce sun's heat back into space — cnet.com

You know how they say that in brainstorming, there are no bad ideas? Kudos, then, to the person at Stanford University who, during a discussion about how to cool buildings more efficiently, said, "I know, let's put big mirrors on top of them and bounce the heat away." OK, I'm not sure it went exactly that way, but the idea at first glance does sound a bit outrageous -- and deceptively simple. But it also works. At least it does according to research recently presented in the journal Nature.

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