Al Gore has given the slide show which became An Inconvenient Truth about 2000 times. Now he's got a new, shorter slide-show (28 mins) that he tries out for the first time here. Hat-tip: Huffington Post.
Ancient Peruvian civilisation grew mighty by harvesting guano
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The Chincha Kingdom was transporting seabird excrement from islands to
valleys as early as the 13th century, and this powerful fertiliser may have
been key...
5 hours ago
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