Intermittency [in availability for wind and solar] changes the economics, particularly this requirement that the power company at all times be able to require power. That's large.

AIDS we're - most of these diseases - we are down from the peak. We're down about 40 per cent from the peak and if we got the right vaccines, which are at the early stage of discovering, then the numbers would come down very dramatically. So that's why we talk about it as an emergency.

So on the demand side [for energy], there have been a variety of policies that globally have been way over $50 billion a year of tax credits, raising the price of electricity through things like renewable portfolio standards, so the total amount of money that's gone into sending a price signal to push up demand versus what would happen without it has been gigantic.

Well, it's taken time to get this going, but he was right. If you give people a chance to associate themselves with a cause they care about, while buying a great product, they will. That was how the RED Campaign was born, here in Davos.

Business isn't that complicated. I wouldn't want to put it on my business card.

The intersection of law, politics, and technology is going to force a lot of good thinking.

I definitely think leaving kids massive amounts of money is not a favor to them.