Fear is the most powerful enemy of reason.

We are in an unusual predicament as a global civilization. The maximum that is politically feasible, even the maximum that is politically imaginable right now, still falls short of the minimum that is scientifically and ecologically necessary.

Global warming is real and human activity is the main cause. The consequences are mainly negative and headed toward catastrophic, unless we act. However, the good news is that we can meet this challenge. It is not too late, and we have everything we need to get started.

There are many who would much prefer that the word 'climate' never be mentioned and that the issue be eliminated from our national conversation.

...it is appropriate to have an over representation of factual presentations on how dangerous it is, as a predicate for opening up the audience to listen to what the solutions are, and how hopeful it is that we are going to solve this crisis.

George W. Bush promised us a foreign policy with humility. Instead, he has brought us humiliation in the eyes of the world. He promised to restore honor and integrity to the White House. Instead, he has brought deep dishonor to our country and built a durable reputation as the most dishonest president since Richard M. Nixon.

I've been dreaming of this moment since I was a kid growing up in Tennessee: that one day, I'd have the chance to come here to Madison Square Garden and be the warm-up act for Elvis.