Yeah, I was about to say... as great as this seems like it may be, surely turning CO2 into coal isn't a net gain versus not burning the coal. But there are ple

Yeah, I was about to say... as great as this seems like it may be, surely turning CO2 into coal isn't a net gain versus not burning the coal. But there are plenty of point emitters of CO2, so if we imagine a grid that's actually renewable sure. Capture though? It could always be paired with another capture method to concentrate it first, it's usually cheap to concentrate things a little and expensive to concentrate them a lot.