Skeptical Science has posted a thorough and comprehensive review of all the scientific literature, weighing all the various contributing variables leading to the present warming trend. We humans and our activities are, far and away, the number one contributing factor.
According to these studies, despite a small cooling effect caused by the natural terrestrial climate processes shown in some of these studies, we’ve more than swamped the cooling contributions out. It all looks pretty bleak, where we’ve raised CO2 levels to their highest in 800,000 years… and yet we’re still fighting with people who deny that CO2 can even harm the environment, or that we’re having an appreciable effect on CO2 levels, or that warming is even happening. It seems as though we’re in a fight for the survival of our species, and we are our own enemy both in terms of who will slit our throats, and in terms of who’s stopping us from staying our own hand.
There’s a light at the end of the tunnel, though. If only we can reach it in time. We need to break our fossil fuel addiction, and we need to do it… oh, about twenty years ago. Science — the same science that we misused to get us into this mess — can get us out. For instance, we’ve found a new bacteria that can turn seaweed into ethanol, and solar technology continues apace. If we destroy our planet, if we cannot undo the damage we have done, then as I’ve said before, perhaps we deserve to die out. That’s how natural selection’s supposed to work, after all.