Speaking of CO2. Capturing CO2 seems to be much less technically difficult than drilling 10 miles down. Various technologies already exist, and pilot plants are running. Perhaps focusing on the practical would be more productive than an illusory silver bullet.
It's not just CO2. It's CO2 and all the other greenhouse gasses.
And regardless, capturing them takes a lot of energy and unless we have a clean source (such as geothermal for example), that means that we will be releasing more greenhouse gasses than the produced amount of energy will capture.
It is far more efficient to not emit CO2 than to recapture it. It's worth doing the napkin math on how much air needs to be processed to undo one American's yearly CO2 footprint... It's a hell of a lot.
