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The Little Ice Age provides insight into the global ecological repercussions of colonialism, and it also hints at the possible democratisation of natural geo-engineering (NGE). NGE involves accelerating carbon sequestration through natural processes as a means of safely ameliorating climate change. A rival approach, artificial geo-engineering (AGE), would put iron filings or limestone into the oceans and aerosols into the skies to reflect sunlight into space. Given the complexity of the global climate system, its tinkering is terribly risky even…