This is getting tiresome.
Very. Even if everything they said about it all being due to mankind were correct, and it isn't*, we could cease all industrial activity today and it would have no effect on what happens ten years from now. You can't undo in ten years something that took over 300 years to do in the first place.
*My own opinion from what I've read on it: Earth has had higher greenhouse gas levels in the past, and over geologic time CO2 levels actually seem to be a trailing indicator of temperature increases, not a leading indicator. The climatic stability of the last 10,000 years is really the anomaly, the planet has had wide climatic swings over relatively short, even very short, periods throughout most of the time before that, and has been considerably warmer and colder even within that 10,000 year sweet spot. Many television interviews of 'Scientists' on it involve shills like Kaku who know about as much about climate science as a lab technician, and their claims of 'It never happened this fast before Man' are utter horseshit. Nor are the 'Climate scientists' even necessarily looking at paleoclimates for validation of their models, they are befogged with modern atmospheric chemistry and projection into the future, the more dire the prediction the better, really Velikovskian in their search for apocalyptic explanations without being able to point to geological antecedents for their claims. Modern humans and their high population do have some effect on climate, I have no doubt...but it's far from the only effect, and I have no faith in the predictive ability of the climate modelers, whose impartiality has been compromised by the fact that they basically all received government grant money for the specific purpose of showing there was indeed man-made global warming (Or 'Global climate change' if it doesn't happen to actually get warmer). BUT it's all moot...we are too far down the road we're on for anything we do to change the outcome, whatever it's going to be.