If youre a young person looking at the future of this planet and looking at what is being done right now, and not done, I believe we have reached the stage where it is time for civil disobedience to prevent the construction of new coal plants that do not have carbon capture and sequestration.

The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it's mentioned.

The cumulative amount of man-made global pollution that's in the atmosphere now traps as much extra heat energy every day as would be released by 400,000 Hiroshima-class atomic bombs exploding every day. It's a big planet, but that's an awful lot of energy.

The Founders of the U.S. gave the senators a term of office three times longer than that of a representative precisely to encourage a reflective frame of mind, a distance from the passions of the voters, and a capacity for deliberative consideration.

I do genuinely believe that the political system is not linear. When it reaches a tipping point fashioned by a critical mass of opinion, the slow pace of change we're used to will no longer be the norm. I see a lot of signs every day that we're moving closer and closer to that tipping point.

There are skeptics who do not come to their view because they have a source of income from carbon polluters.

We're all capable of mistakes, but I do not care to enlighten you on the mistakes we may or may not have made.