What do real scientists say ???

I know this doesn't comport with what your social studies teacher is saying, but .... Climate change is an urgent topic of discussion among politicians, journalists and celebrities...but what do scientists say about climate change? Does the data validate those who say humans are causing the earth to catastrophically warm? Richard Lindzen, an MIT atmospheric physicist and one of the world's leading climatologists, summarizes the science behind climate change.

Global Warming Fade-Out