Yes, and this is where it gets very very complicated and there is little agreement, and even understanding. Just how much effect is man's CO2 having? I came across a paper recently which said the humidity above the oceans, which had been increasing, has leveled off and started decreasing since 2000. This is unexpected if you believe CO2 is driving ocean temperatures, but expected if you believe incoming visible radiation is, because it was about this time that the sun peaked in activity. If humidity is falling, then the positive feedback on CO2 is too, which means it has only a very mild effect on temperatures. However, given in the past CO2 has been as high as 5,000 ppm, and surface temperatures as high as 21 C (todays is 14 C on average) it is clear that life will survive even quite large changes, so the suggestion that life on earth is at risk, and particularly human society, is just ridiculous. Ten years to save the planet! Really, how gullible do they think we are!