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I think that one 🤷 is meant to be gender neutral. 🤷‍♀️ & 🤷‍♂️ are less ambiguous.

The US was still fighting in Vietnam while that was happening.

This is a really important insight. To add to it: back when the carbon from Pool 2 was in the atmosphere, dinosaurs were roaming the earth and it was a lot hotter than it is now.

This is obviously a simplification, it but it drives home the point that once the carbon is out of Pool 2 it will cause global warming. The only way to stop that is to stop moving carbon from Pool 2 into Pool 1, ie stop fossil fuel mining.

Of course we could try to move carbon from Pool 2 to Pool 1, but it took the Earth millions of years to do that, and many of the plant species that did it are now extinct. Perhaps once we’re exinct, they might evolve again.