John Kerry: “Bush broke a trust with the American people with his decision to invade Iraq.”

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.

But, we could with battery. We could with-- there's ways to make that work.

Obviously, we're already seeing ways in which it's going to affect people.

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.