If the worst-case scenario about climate change, all the worst predictions, if they never materialize, what will be the harm that is done from having made the decision to respond to it? We would actually leave our air cleaner. We would leave our water cleaner. We would actually make our food supply more secure. Our populations would be healthier because of fewer particulates of pollution in the air – less cost to health care. […] But imagine if the 97 percent of those scientists are correct and the people who say no are wrong. Then the people who say no will have presented us with one of the most catastrophic, grave threats in the history of human life.