John Kerry: “We're a country of optimists. We're the can-do people.”

What we are trying to achieve now is really to establish some stability if we can, in the relationship, without conceding anything.

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.

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

I think we have to look at this beyond the China.