That's right-the striking thing about greenhouse gases is the diversity of sources that emit them. A herd of cattle belching can be worse than highway full of hummers.

Our president's latest energy initiative was to go to Saudi Arabia and beg King Abdullah to give us a little relief on gasoline prices. I guess there was some justice in that. When you, the president, after 9/11, tell the country to go shopping instead of buckling down to break our addiction to oil, it ends with you, the president, shopping the world for discount gasoline.

I could see America playing a slightly smaller role in the Middle East but I would not see us abandoning the region and just say "Oh," like I said, "China, Russia, it's yours now. Global focus is just on our hemisphere." I don't see that happening.

I think that the drama of people rising up demanding their own freedom is one that resonates very deeply with America. I think that President Barack Obama has tried and would like to find a way to relate to the Arab Spring, but I think he also wants to be, rightly, very careful that we don't take it over. It is very important that they own this. He is trying to influence it this way but without, "We're so never going to go to the extreme of Iraq and putting boots on the ground again."

If you don't have an ethic of conservation, you basically have a license to drive a Hummer through the Amazon.

Iraq may still have a decent outcome...but even if it becomes Switzerland, we overpaid for it.

It created a global platform that allowed more people to plug and play, collaborate and compete, share knowledge and share work, than anything we have ever seen in the history of the world.