Al Gore: “The efficacy of a cap-and-trade system goes way up when it is truly global.”

I think it's crucial. They are the largest global warming polluter in the world, we are second to them. And obviously, cooperation between our two countries is essential.

The price of solar has come down so quickly that there are now 100,000 solar panels installed every day in Africa.

The ongoing attacks on liberty are reminiscent of Nazi Germany.

No, I'm not. And those labels don't mean what they once did.