In today's New York Times, Al Gore offers a five-part plan to repower America by producing 100% of its electricity from carbon-free sources within 10 years.
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...
4 hours ago
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