USA Today: For far too long, our national debate about climate change has been about "yes or no:" Is human-caused climate change real? That debate should now end. Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening. If 97 of 100 doctors told you that your child's health was at serious risk without surgery, how long would you wait for the other three to get on board? The next debate is about how we should respond. Those decisions should...