Design does matter. And not necessarily in a way that people realize. A lot of what you do, people take for granted - that a park has always been here, that a bicycle lane has always been there, that the street is safe or clean.

Go walk the streets of Beijing. It's pretty hard to argue it isn't a modern city. Now, if you go outside [of Beijing], in the rural areas, that's true. But rural America, you can say the same thing, in Appalachia there's an awful lot of poverty and lack of education.

Yes, they broke the law, but we can't deport them. Let's get over this pointing fingers and do something about that, whether it - they have to pay a fine, learn to speak English, the history, you can do that. And then you have to give visas for the skills we need.

When I came into office, people said, 'Billionaire? How do they live? What do they eat? How do they sleep?' Today, they see me on the subway coming uptown. A couple of people say hi, some people smile and nod. Some people just sleep. It's not an issue.

The main claim to fame, I think, of Bernie Sanders - who I've never met; I'm sure he's a pleasant guy - [is that] he's certainly not stupid.

Other ways of looking at the environmental or climate change stuff is to frame it in the context that it is simultaneously a public health issue. One out of eight premature deaths worldwide happens because of air pollution. The worst power plant in America kills 278 people a year and causes 445 heart attacks. So, when we improve air quality we improve our lives, and at the same time we improve the climate as well. We must see climate policy from this perspective and not as an abstract threat that may threaten our survival in 100 years.

The truth of the matter is: you can create a great legacy, and inspire others, by giving it to philanthropic organizations.