With the recent advances of turning CO2 into other substances, such as propane, should we be focusing more on closing the carbon cycle and simply be producing fossil fuels from the waste products of yesteryear?
Naively, it feels like we understand C, O and H, better than we understand some of the rare metals we're now introducing in the name of climate change.
Our CO2 emissions are warming the Earth and making it unliveable for billions of people in the global south.
The localized toxic pollution problems you mentioned are a secondary problem.