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Solution to desertification

Nearly two thirds of the world's land surface is desert and it's growing. Overgrazing has been seen as the problem but perhaps controlled overgrazing is the answer. This TED talk by Allan Savory offers a non-technological solution that works with the grain of nature which, if true, could be a turning point.

http://www.ted.com/talks/allan_savory_how_to_green_the_world_s_deserts_and_reverse_climate_change.html
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