Well look at that, the Aussie's have done it, a way to turn CO2 back into coal, at room temperature and it's scalable, problem solved.
https://www.thegwpf.com/carbon-dioxide-the-newest-form-of-renewable-energy/
Link to the paper
https://www.nature.com/articles/s41467-019-08824-8
This should be all over every front page in the world, we're saved, hoorah!