Well I made the comment to point out, with the climate change discussion and all, that the big point is we don't want this stuff entering the carbon cycle. If it's good for this stuff to enter the carbon cycle, then climate change due to CO2 isn't a problem, burn it. If it is a problem, then it should be sequestered from the carbon cycle, like the stuff that came from the ground was a billion years ago, and some complex way of basically burning it is counterproductive.