I don't think it's as dire as you're supposing. I hadn't expected the rollout of renewables and the growth of EVs to be as swift as we've seen.

If we can cut emissions entirely then that's the first step. Next devote 5% of energy generation to CO2 removal and we'll take out a year of 100% emissions in less than 20 years. We don't need to go back down to 280 ppm, something like 320 would be fine. It's a long term project but it can work.

Need step one first though.