If you ask a scientist how much more CO2 do you think we should add to the atmosphere, the answer is going to be none.
All the rest is economics.
Gavin A. Schmidt, climate scientist.
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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