2) Fossil fuels are inherently limited, [edit:] and[/edit] you don't need a very long term before relying on them begins to seem like a false economy. Fossil fuels as a whole may still be growing as fast as ever, but oil's growth has slowed down. Even if global warming weren't happening at all, we'd be better off getting ourselves significantly freer of oil over the next decade or two.

In a free market, so long as the interest rates are not too high, depleting fossil fuel reserves would raise fossil fuel prices decreasing fossil fuel consumption, with no need for government and/or collective action. (Arguably that's already happening; I also suspect that it's a major part of the reason of the Great Stagnation since the mid-early 1970s, especially given that people pointing it out like to measure it in terms of metrics such as energy consumption per capita.) So all we have to do is realize we're in a hole and stop digging.