Even if America tomorrow - and it won't happen overnight - but if we did reduce our demand for gas and natural gas and crude oil by a significant degree, that does have an exponential effect on producers in the Middle East, everything else being equal. But if China's demand is growing and India's demand is growing, they are not going back.

Scientists tend to focus on what they don't know more than what they do know. And there are a lot of things we still don't know about the climate. But we know the difference between climate variability and climate change, and right now the amount of carbon in the atmosphere is well outside the variability pattern - and that's quite quantifiable.

I have a daughter who is a sophomore in college and another who is in the 11th grade of high school.

The Arab world had a big problem of frankly venal elites. That is why these revolutions happen, because people didn't think the opportunities were being shared fairly.

If e-mail had been around before the telephone was invented, people would have said, 'Hey, forget e-mail! With this new telephone invention I can actually talk to people!'.

In China today, Bill Gates is Britney Spears. In America today, Britney Spears is Britney Spears-and that is our problem.

Obviously China is clearly taking the lead in some areas, but when it comes to the most advanced innovation, it's still America.