I don't have the illusion that there's any position or role in the world with as much potential for bringing about change as that of president of the United States.

...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.

The global warming deniers persist in this air of unreality. After all, the entire north polar icecap, which has been there for most of the last 3 million years, is disappearing before our eyes. Forty percent is already gone. The rest is expected to go completely within the next decade. What do they think is causing this?

The survival of the United States of America as we know it is at risk. And even more — if more should be required — the future of human civilization is at stake.

I drive a hybrid. Tipper and I got a Lexus hybrid. And we have a couple of Priuses in the family with our children. And I encourage people to make environmentally conscious choices because we all have to solve this climate crisis.

I work to promote the idea of sustainable capitalism driven by long-term considerations rather than quarterly profits, which seeks to better people's lives and the planet rather than destroy them.

The physical relationship between CO2 molecules and the atmosphere and the trapping of heat is as well-established as gravity, for God's sakes. It's not some mystery.