Ok let's assume global warming is caused by human activity.
The next assumption on the Left is that big government will fix the problem.
Big government has done such a great job in the past of fixing our health care system and of ending poverty and of stopping drug abuse that I am sure it will reverse global warming in no time.
But just in case, it's probably best to follow the advice of P.J. O'Rourke and buy real estate in Greenland.