CO2 is the exhaling breath of our civilization, literally... Changing that pattern requires a scope, a scale, a speed of change that is beyond what we have done in the past.

I affirm my faith when I'm asked about it. But I always try to do so in a way that communicates absolute respect, not only for people who worship in a different way, but just as much respect for those who do not believe in God and who are atheists.

We sometimes emphasize the danger in a crisis without focusing on the opportunities that are there.

There are people who are genuinely upset in the Tea Party. I understand that. But that movement was funded with seed money from right-wing billionaires, the Koch brothers, and promoted on Fox News, and turned into a stocking horse for the right-wing agenda that a lot of people have been trying to push on the country for a long time.

The debate's over. The people who dispute the international consensus on global warming are in the same category now with the people who think the moon landing was staged on a movie lot in Arizona.

To use a Southern euphemism, our space program has been snake-bit.

You can push your local communities to adopt more sustainable sources of energy and environmentally-friendly practices.