You're probably on the right track. One thing to mention, though, is that all the easy-to-dig carbon fuel has been dug, so "use coal to power X" just isn't qui

You're probably on the right track. One thing to mention, though, is that all the easy-to-dig carbon fuel has been dug, so "use coal to power X" just isn't quite as feasible. Biomass just doesn't work for a lot of it.