Humans can both stop and control climate change as technology gets more efficient. By improving on the best methods of Carbon sequestration and doubling their efficiency a couple times. Then take the (inflation adjusted)cost of electricity and cut it in half a couple times. The economies of scales makes it very tractable. The only problem is that environmentalists want knee-jerk NOW solutions as opposed to putting in the hard work over the next century. As if a reduction-based policy is going to save some sacred rhino species. Not only will a Western reductionist strategy not halt CC but it's self defeating from a democracy perspective since it's based on ignoring economic prosperity metrics such as growth.