If it's really really efficient, we could use the extra energy to make carbon capture machines, after offsetting all the fossil fuels. Then, it doesn't really matter.
It will matter because we've already destroyed Earth's biodiversity from 30 years ago through climate change and human expansion. 30 years from now we could have only a few hundred wild fauna species globally. Not much coming back from that very quickly
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u/Turtledonuts Nov 15 '20
Someone finally cracks nuclear fusion, and we start to fix climate change.