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Can Cities Save the Earth?

NPR Krulwich Wonders

Let’s get dense. If we take all the atoms inside you, all roughly 70,000,000,000,000,000,000,000,000,000 of them, and squeeze away all the space inside, then,

http://www.npr.org/blogs/krulwich/2013/04/08/176565424/the-big-squeeze-can-cities-save-the-earthRead more...

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