We have reduced poverty in the world by 50% since the year 1970 - the number of people who go to bed hungry, the number of people that have to sleep without a roof over their heads, the number of people that are illiterate.The world is better.

I'm worried about the world because there's chaos in the Middle East, and I think the Iranian deal [to lift sanctions] is going to continue the Shia-Sunni battles, the Persian-Arab battles.

I don't know why you should be proud of something. It doesn't make you any better or worse. You are what you are.

Any friend of fossil is a friend of mine... We’ve got to do everything we can to get people out of their automobiles and into mass transit.

Don't be afraid to assert yourself, have confidence in your abilities and don't let the bastards get you down.

By speeding the transition to cleaner energy, we can improve the lives of billions of people, while also reducing the risks we face from a changing climate.

Our climate is changing. And while the increase in extreme weather we have experienced in New York City and around the world may or may not be the result of it, the risk that it may be - given the devastation it is wreaking - should be enough to compel all elected leaders to take immediate action.