Some nice politician should propose a tax! Not for, uhm...control or anything, but to research what human foibles/habits might be leading to this planet's nasty behavior/wiping us out and to build structural shelters & underground facilities so that we may survive this calamity.
One thing's for sure - when those comets hit they're gonna' leave one hell of a footprint...carbon or otherwise!!
[Maybe it's a result of not having enuf transgendered bathrooms quickly?? ]