It's even worse than zero net effect, it's negative, owed to all the auxiliary inefficiencies. Add to that methane slip and it's infeasible by a long shot. The

It's even worse than zero net effect, it's negative, owed to all the auxiliary inefficiencies. Add to that methane slip and it's infeasible by a long shot. The solution can never be to remedy surface-level GHG. The sources need to remain buried and replaced by true renewables. Anything else is just an afterthought, patching what's already too little too late. Almost all fossil-based material that made it to the surface will end up contributing to GHG.