The government can’t change the weather. I said that in the speech. We can pass a bunch of laws that will destroy our economy, but it isn’t going to change the weather. Because, for example, there are other countries that are polluting in the atmosphere much greater than we are at this point, China, India, all these countries that are still growing. They’re not going to stop doing what they’re doing. America is a country, it’s not a planet. So we can pass a bunch of laws or executive orders that will do nothing to change the climate or the weather but will devastate our economy.

First of all, the climate is always changing. That's not the fundamental question, the fundamental question is whether man-made activity is what's contributing most to it. I understand that people say there is a significant scientific consensus on that issue, but I've actually seen reasonable debate on that principle.