Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

At least I sure hope it will - and I see good signs all the time, especially in things like the rise of local agriculture.

But the truth is that we could win every other fight that we face and if we lose the climate fight, the other victories will be pyrrhic. I don't think even people who are worried about climate change quite understand the scale and speed with which we're now shifting the planet.

There's always the danger that people will simply sign online petitions, the way they used to just mail in checks, and there's the greater possibility we'll just spend our whole lives staring at screens and never get anything done.

With each month that passes, a solar panel gets 2 or 3 percent cheaper. So while we're holding the fossil fuel industry in check, the engineers in the renewable energy world are undercutting them from the other side.

If you look at the polling data, long before anyone had thought about Iraq, it was the [George W.] Bush Administration's decision in the first few weeks in its tenure in office to abnegate the Kyoto treaties that set our international perception into a nose-dive. People around the world looked on in amazement as the biggest part of the problem decided it wasn't going to make any effort to help with the solution.

I do a certain amount of work in religious communities on these issues. It's not the central focus of my work but it is certainly an area where I have worked a lot. It has gotten much better over the years, especially over the last couple years. There wasn't a religious environmental movement 15 years ago, but there is now - in the Catholic community, the Jewish community, the mainline Protestant community, and in the Evangelical community.