I was in Peru and visited a building near Lima built by the Incas. It was low in height, with no windows at all, but all the way in the back there was air movement. And I couldn't figure out how they'd done it; it was incredible.

I never said I was opposed to the LEED program or to green building - I'm not.

There are people who design buildings that are not technically and financially good, and there are those who do. Two categories - simple.

You have freedom, so you have to make choices - and at the point when I make a choice, the building starts to look like a Frank Gehry building. It's a signature.

We have been spending beyond our means, we are going to focus on the projects that we committed to in the election but importantly if there is additional projects or new things that come up they have to have a business case, they have to work and they can't impose financial stress on families and private individuals and businesses.

I find it fascinating that a lot of business books that do well are from people who've never made any money in business.

I do lament how many investors focus on all the short-term sugar buzz of some marginal improvement in something - nothing history books are ever going to be written about. In many cases, these are quick and easy ways to make money.

And finally, no matter how good the science gets, there are problems that inevitably depend on judgement, on art, on a feel for financial markets.