This is excellent. Ted Cruz masterfully debates Sierra Club President, Aaron Mair, on Climate Change, asking him about the objective data that shows no significant warming trend in the last 18 years. But Mair only wanted to focus on a study that he agrees with, that says 97 percent of scientists say the earth is cooking or something and claims the science is settled and no longer up for debate. It was pathetic. Cruz took him apart, exposing the fact that he doesn’t know what the heck he’s talking about, and then schooled a Democrat who objected. Watch: