It's smart to use the things that are limitless and free. It's smart to think about where stuff comes from and ends up. It's even smarter to close the loop between the two. My piece for Intelligent Life about the low-carbon future.
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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