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Up on the Roof: The Power of Biology on Skyscrapers

How about growing gardens on the tops of skyscrapers as a way of combating global warming? A Columbia University professor has proposed it.

This kind of "skyfarming" is not at all pie-in-the-sky, and is precisely the kind of answer I always give to people who say, well, even if global warming were really happening, what could we possibly do to stop or even diminish it?

The answer is not just using energy more carefully, or in developing further cutting-edge green-friendly technologies. The power of biology itself can also help. Fighting nature - or what we've done to nature - with nature…

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