'They have decided to take action in the face of huge challenges, displaying not just patience and persistence, but a sense of urgency and determination.'
Nobel Laureate Wangari Maathai on the winners of last night's Ashden Awards.
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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