This is a huge problem. If we don't deal with this within just a few years, you will have island nations flooded; you will have the agricultural balance of most countries completely changed; you will have a dramatic increase in the number of severe, unmanageable weather events... And the good news is that we can now deal with this problem - and strengthen our economic growth, not weaken it.

Sarah, there's a government inside the government, and I don't control it.

I think you have you to give people the facts [about global warming], and then you have to tell them, this is not like drinking Castor Oil. There is a, an economically exciting way for us to create a whole new generation of American jobs without costing them an enormous amount of money or forcing them to change their lifestyle.

When I leave the office on January 20th, I will leave even more idealistic than I was the day I took the oath of office.

We [Democrats] have got to be strong. When we look weak in a time where people feel insecure, we lose. when people feel uncertain, they'd rather have somebody who's strong and wrong than somebody who's weak and right.

Climate change is more remote than terror but a more profound threat to the future of the children and the grandchildren and the great-grandchildren I hope all of you have.

Nothing we do in this great capital can change the fact that factories or information can flash across the world, that people can move money around in the blink of an eye... Nothing can change the fact that technology can be adopted, once created, by people all across the world and then rapidly adapted in new and different ways by people who have a little different take on the way that technology works.