I don't think global warming is evil. To some extent it is a natural process, now being accelerated by anthropogenic CO2 and soot.

I conceed the point about cheaper methane production. Over extrapolation is an epidemic on this board and I fell victim.

Reguarding CO2 sequestration from this process, I think that would be excessive. As this process is renewable and cyclic, all the CO2 does is transfer carbon from poo to plants. It's the carbon that's been burried for millions of years now taking atmospheric concentrations out of a more natural regime that I think should be concidered.

The bio-geosphere already engages in carbon sequestration, all we have to do is leave the coal in the ground.