If you allow someone like Saddam Hussein to get nuclear weapons, ballistic missiles, chemical weapons, biological weapons, how many people is he going to kill with such weapons? He's already demonstrated a willingness to use these weapons. He poison-gassed his own people. He used poison gas and other weapons of mass destruction against his neighbors. This man has no compunction about killing lots and lots of people. So this is a way to save lives and to save the stability and peace of a region of the world that is important to the peace and security of the entire world.

What changed in the United States with Hurricane Katrina was a feeling that we have entered a period of consequences.

In the United States of America, unfortunately we still live in a bubble of unreality. And the Category 5 denial is an enormous obstacle to any discussion of solutions. Nobody is interested in solutions if they don’t think there’s a problem. Given that starting point, I believe 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.

We're putting 70 million tonnes of pollution into the atmosphere every day, trapping an enormous amount of extra heat from the sun inside the earth's atmosphere. It's threatening to push the planet past a tipping point beyond which climate change would be difficult to stop

When you have the facts on your side, argue the facts. When you have the law on your side, argue the law. When you have neither, holler.

A day will come when our children and grandchildren will look back and they'll ask one of two questions. Either they will ask: "what in God's name were they doing?" or they may look back and say: "how did they find the uncommon moral courage to rise above politics and redeem the promise of American democracy?"

The center of the earth is about a million degrees.