So we do software for watches, for phones, for TV sets, for cars. And some of these take a long time to catch on.

There's only one trick in software, and that is using a piece of software that's already been written.

Microsoft has had its success by doing low-cost products and constantly improving those products and we've really redefined the IT industry to be something that's about a tool for individuals.

The US in some ways has been the best. Who figured out shale gas? Although that wasn't a good thing [for CO2 levels], it was very innovative. It's led to low-cost energy. Who figured out nuclear power? Largely the United States. Once you get past the steam engine, which is mostly British, then the US has been at the center of most of the energy things that have happened.

In this business, by the time you realize you're in trouble, it's too late to save yourself. Unless you're running scared all the time, you're gone.

The world today has 6.8 billion people...that's headed up to about 9 billion. If we do a really great job on vaccines, health care, reproductive health services, we could lower that by perhaps 10 to 15 percent.

I love nuclear. It does this radiation thing that's tricky. But they're good solutions. You know, it was interesting; recently, in Connecticut this natural gas plant blew up 11 guys. It just blew them up.