Fifty percent of the world's population lives in cities. In a couple of decades, 70 percent of the world's population will be living in cities. Cities are where the problem is. Cities are where the solution is, where creativity exists to address the challenges and where they have most impact. This is why, in 2005, the C40 was founded, an organization of cities that address climate change. It started with 18 cities; now it's 91. Cities simply are the key to saving the planet.

Government is dysfunctional.

Government by three men in a room has turned New York State into a national symbol of governmental dysfunction. Enough is enough!

Well, we have to provide the world's best schools. We certainly don't have them, but that's our objective.

I think [Winston] Churchill said it was " [democracy] the worst of all systems except for all the others." And that's probably true. It's never gone easily.

I think that most of the candidates [for presidency] can't run the railroad, and I still worry that whoever gets elected will have policies designed for political rather than practical reasons.

Nobody is going to delegate a lot of power to a secretary that they can't control.