Certain food-based biofuels like biodiesel have always been a bad idea. Others like corn ethanol have served a useful purpose and essentially are obsoleting themselves.

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

In my view, it’s irreverence, foolish confidence and naivety combined with persistence, open mindedness and a continual ability to learn that created Facebook, Google, Yahoo, eBay, Microsoft, Apple, Juniper, AOL, Sun Microsystems and others.

We don't need a fuel that's cleaner, we need a fuel that happens to be cleaner, but is half the price of oil.

Electric cars are coal-powered cars. Their carbon emissions can be worse than gasoline-powered cars.

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.

Everybody else is afraid to fail. I do not really care because when I fail, I try something new.