"In a closed system, you can't reverse something by using less energy than that which went into creating it."
You can do it elsewhere, though. And by different means.
Sahara is really big, really empty and has a lot of sunlight. If we had some at least semiefficient method of dumping carbon from the air back to solid form using electricity, the whole mankind could pay Niger or Chad or Libya or Algeria to rent 100 000 sqkm of dry desert, build a huge solar power station there and bury the resulting carbon mass in large, kilometer-deep trenches covered by stone and sand.
This further proves my point. People never bother to even attempt to do the math. People "know" the truth and "believe" in climate change and "solutions", yet nobody seems to have any interest in actually confirming what they are being told.
It's as bad as anti-vaxxers believing the government is installing tiny remote control radios in vaccines to control our minds. It really is that crazy, if not more.
You can do it elsewhere, though. And by different means.
Sahara is really big, really empty and has a lot of sunlight. If we had some at least semiefficient method of dumping carbon from the air back to solid form using electricity, the whole mankind could pay Niger or Chad or Libya or Algeria to rent 100 000 sqkm of dry desert, build a huge solar power station there and bury the resulting carbon mass in large, kilometer-deep trenches covered by stone and sand.