The willingness to fail gives us the freedom to succeed.

If everyone played it safe, we wouldn't get anywhere.

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

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.

I'm a fiscal hawk. I vote against all taxes, but I do believe the environment, and climate change, is a bigger issue than fiscal deficits are as a risk to the nation.

The U.S. has fallen well behind Europe in recognizing climate change and the implications of climate change.

The only way you multiply resources is with technology. To really affect poverty, energy, health, education, or anything else - there is no other way.