[matthewdgreen]

This might be the only solution. At any point in the near future we may learn that our previously-emitted GHGs have locked us into a climate feedback loop that ends with unsurvivable temperature increases (at least, unsurvivable for global civilization.) At that point what's the alternative? (And yes: it is catastrophic that we've put ourselves in a situation where this might be our only hope of surviving, happy to discuss the allocation of blame for that mistake.)