John Kerry: “If the P5+1 agreement is rejected by the United States, I don't think we can rely on those other countries keeping that…”

The message coming out of this COP is, we are moving away from fossil fuels. We are not turning back. That is the future.

I know President Biden feels very strongly about living up to our commitments, and our values.

People really do count on America for a lot of things in the world, and I think everyone should be extraordinarily proud of our history of doing things.

The U.N. Finance Analysis suggests that it will cost trillions of dollars. Maybe $2.5 to $4.5 trillion a year between now and 2050.