Combating climate change requires government policy, and most conservatives hate the idea of more government regulation. Because they hate the prescription, they deny the diagnosis.

You'll know the green revolution has been won when the word 'green' disappears.

At the end of the day, no amount of investing, no amount of clean electrons, no amount of energy efficiency will save the natural world if we are not paying attention to it - if we are not paying attention to all the things that nature give us for free: clean air, clean water, breathtaking vistas, mountains for skiing, rivers for fishing, oceans for sailing, sunsets for poets, and landscapes for painters. What good is it to have wind-powered lights to brighten the night if you can't see anything green during the day? Just because we can't sell shares in nature doesn't mean it has no value.

The hidden hand of the market will never work without a hidden fist -- McDonald's cannot flourish without McDonnell Douglas, the builder of the F-15. And the hidden fist that keeps the world safe for Silicon Valley's technologies is called the United States Army, Air Force, Navy and Marine Corps.

I have no problem with a war for oil-if we accompany it with a real program for energy conservation. But when we tell the world we couldn't care less about climate change, that we feel entitled to drive whatever big cars we feel like, that we feel entitled to consume however much oil we like, the message we send is that a war for oil in the gulf is not a war to protect the world's right to economic survival-but our right to indulge. Now that will be seen as immoral.

To me the smart thing that governments in the Middle East would be doing right now is taking their oil and gas fountain - and the smartest ones are to some degree - and making sure they're investing in their people to unlock their potential - men and women.

There's a difference between being able to make long distance phone calls cheaper on the Internet and walking around Riyadh with a PDA where you can have all of Google in your pocket. It's a difference in degree that's so enormous it becomes a difference in kind.