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Sebastião Salgado: The silent drama of photography
16:53 Posted: May 2013
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Wade Davis: Gorgeous photos of a backyard wilderness worth saving
06:35 Posted: Feb 2013
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Tristram Stuart: The global food waste scandal
14:15 Posted: Sep 2012
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Jonathan Foley: The other inconvenient truth
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James Hansen: Why I must speak out about climate change
17:51 Posted: Mar 2012
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Lucianne Walkowicz: Look up for a change
11:23 Posted: Feb 2012
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Garth Lenz: The true cost of oil
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Simon Berrow: How do you save a shark you know nothing about?
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Justin Hall-Tipping: Freeing energy from the grid
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Alex Steffen: The shareable future of cities
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Jonathan Drori: The beautiful tricks of flowers
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