Without a movement pressing for change, there's little hope. We've got to work the political system to make this happen fast. The physics and chemistry are daunting. The resources on the other side are very large.

Policies that engage us again in the international fight for real climate protection.

When you have solar panels, your electricity gets there for free, no one's figured out how to meter the sun yet. And that's good.

But tolerance by itself can be a cover for moral laziness.

I'm probably the wrong person to ask. My partner in much of this work [climate movement], who really came up with the divestment campaign with me, Naomi Klein, I think has written powerfully about this.

When we think about global warming at all, the arguments tend to be ideological, theological and economic.

Solar power seems to be truly bipartisan in its appeal.