it comes to agriculture. the risks to lively lood that climate change poses. we're seeing attack on economy now. if wu don't do something about this problem, by the end of the century we'll see it. 10% of our economy will be lost due to how many caused climate change and its impact. it's far too expensive not to act. >> amy, the argument coming from republicans. you heard it a moment ago with senators lee saying it's too costly to do anything about it. there used to be consensus on climate change. back in the '80s, george h.w. bush said we will combat the greenhouse gas effect with the white house effect. this used to not be an argument