John Kerry: “I am hopeful that the Egyptians will reconsider their position and that this matter will be resolved promptly.”

The message is, let's find a way to be able to make sure when we fly, we're not leaving emissions that we cannot capture.

People think this is now, you cannot reverse it, it is irreversible.

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

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.