Problem is, science has been spectacularly wrong over and over again throughout history. The oft-quoted aphorism is "Science progresses one death at a time." The mossy old guard dies off, allowing new ideas their due. Science is easily manipulated by politics, money, fashion, personality--all the usual suspects. Innovation isn't promoted unless someone can make money off it. "Peer-reviewed" publication is mostly a joke when forward-thinking scientists go up against the old guard. That having been said, I'm willing to support technological (and low-tech) methods to address climate change, though I'm skeptical that they will make much difference in the long run.

Overpopulation is a problem, but developed countries are doing fine in that department--IMO--and developing countries will automatically produce fewer offspring--if history is any indicator. I read somewhere that world population is expected to stabilize at a relatively high but manageable level.