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.

You take one bomber and deploy him in Baghdad, and another is manufactured in Riyadh the next day. It's exactly like when you take the toy off the shelf at Wal-Mart and another is made in Shen Zhen the next day.

What we do know is that the planet is going from 7 billion people today to 9 billion. More people want to live like us, drive American- size cars, live in an American-size home, and eat American-size Big Macs. What does that mean? It means that energy demand is going to be going up.

The unemployment rate today for people with our-year college degrees is 4.1%, which is almost none. That's people switching jobs basically. That tells you that education is the only way up and the only way out. If that is the fact, then we've got to get more of it for more people.

Several technological and political forces have converged, and that has produced a global, Web-enabled playing field that allows for multiple forms of collaboration without regard to geography or distance - or soon, even language.

The poverty fighters resent the climate-change folks; climate folks hold summits without reference to biodiversity; the food advocates resist the biodiversity protectors. They all need to go on safari together.

A 2011 report produced by Forrester Research estimated that the revenue generated through the sales of smartphone and tablet applications will reach $38 billion annually by 2015. Think about that: An industry that did not exist in 2006 will be generating $38 billion in revenues within a decade. . . .