>> we'll get into that, but we'll stick on the science for a minute. it was 3.4 degrees. >> 3.6. >> being the tipping point. when you look at this report and you look at that tipping point number, do you think what this report is recommending is the solution to avoid hitting that number? >> these are policy questions. but from an engineering standpoint, which is what we need is energy storage. by that expression i mean bat ris. we need a better battery of some kind. to do that we would invest and we would invest in the same way we had a space program. people will have to draw this analogy to apollo. you put these dozen nasa centers in all these different states and these e enormous problems were solved. so the problem, though, if you have people that think the problem doesn't need to be solved, then you can't begin the longest journey with the single step. >> that has been the political