Being coal free is a good enough goal in itself, getting off fossil fuels completely in the short term was always a stupid, irrational and religious idea.

If the world transitioned everything currently on coal to Nat gas, along with population decline that's happening, it solves the worst effects of climate change for the rest our lives (Nat gas provides the same power as coal at half the emissions, so 2X less Co2 and 10X less on many air pollutants).

And in the next 100 years if we haven't made fossil fuels irrelevant with cheap modular fission OR made fusion viable OR made space solar viable, then something horrible has happened and Co2 emissions will be the least of our worries.