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The Earth will actually be unenhabitably hot way before then
As the sun gets older it will get brighter. Ironically this will draw all the CO2 out of the air but at the same time make the Earth too hot to survive on
Source: The Ends of the World
Maybe we should blow up Earth first, show it who’s boss
There is nothing we can do yet, 5 billion years is a long time and this can go one of 2 ways, either we die due to a mass examination event by then or our since evolve so much that we can actually create suns by that point!