Tolerance is the value that was selected to put on here, and tolerance is as American as apple pie.

We can't tell China what to do if we don't do it ourselves. You don't inspire someone to take an action by refusing to take it yourself. We are in a race to be the dominant clean-energy provider to the world. Maybe this goes without saying: We've got to get China into an international protocol and the magic words are "common responsibility with differentiated action."

We [USA and China] have a common responsibility with different numerical targets, and that's the situation ultimately we are going to have with China. We emit six times more per person than they do. It's hard to tell them to cut theirs in half right now until we start moving. Being the ostrich with your head in the sand and tail feathers in the air like some would have us to do while China continues to pollute is simply not an option.

President Bush's proposal to focus our resources on sending humans to Mars is intriguing, but it is not the most compelling reason that Americans ought to focus our interest on the Red Planet.

I'm sure that in the fullness of time we'll learn that one or more of these seemingly promising technologies were dead ends. And that's the nature of innovation, and that's why we should spread our bets; we should not put our eggs in any one basket. Some of these will be grand successes, some of them will be average, and some of them will be abject failures.

With 1 million square miles of the Arctic melting unexpectedly this summer, these are warning signs that we have to act and act now. Our addiction to Middle Eastern oil obviously has security implications, and we think it's about time to be generating Eastern Washington wind energy instead of sending our money to the sheikhs.

We allow it to be dumped into this community asset, which is our one and only atmosphere. So that has to change, and there's really only one entity that can do that. So we have proposed a cap-and-trade system to stop that unlimited pollution, to use the forces of the market to efficiently allocate scarce permits to allow CO2 into the atmosphere. That's just one of 500 things we need to do, but it's probably the granddaddy of them all.