I believe cellulosic fuels, biofuels made from nonfood crops are the only solution that will make a difference.

The world is hung up on food-based biofuels. Not only are they the wrong thing, they're the uneconomic thing.

I believe cellulosic fuels, biofuels made from nonfood crops are the only solution that will make a difference.

There are parts of the country in America, in the Midwest, where wind is a big resource, and we should absolutely use it. But to try and apply it nationally doesn't make sense. There are technologies that will work that are appropriate to certain regions.

Is it 10 years, 20, 50 before we reach that tipping point where climate change becomes irreversible? Nobody can know. There's clearly a probability distribution. We need to ensure this planet, and we need to do it quickly.

Every big problem is a big opportunity.

If I collected all the diamonds in the world, I'd have no 'income' but I'd have a lot of 'assets'. Would my company be worth nothing because I have no income? A lot of Net companies are collecting assets. They have to be measured with a new set of metrics.