I’m not sure what your point is. So because the science might change or evolve, you don’t do anything. If we don’t know exactly what causes some cancers, do we avoid all cancer treatments? The critical thing to understand about tackling climate change is that it’s good for us anyway — cleaner air, lower energy costs, more jobs, and on and on. So what is the real point of fighting about whether the fundamental science is settled (which it is, but it doesn’t really matter when deciding whether you’d rather have a company or economy that produces a lot of carbon vs. one that uses more advanced technologies).