Forest fires wouldn't matter to Putin, and exploding methane craters, well, I am sure Putin would think that's fine, as long as it doesn't affect ethnic Russians.

but the shrunken demand for oil, that's more of a Putin starting this war issue than a global warming issue. Clearly most countries were fine with using oil even when presented with clear evidence of it's damage (talking western countries here, developing countries kind of need to use oil to catch up and it is unfair to deny them the same luxury western countries had).