John Kerry: “We are trying to limit the most harmful consequences of climate change.”

The era of the Monroe Doctrine is over.

We are now giving less than a lot of other countries are doing in order to help particularly on climate.

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.

We're spending billions--literally, actually, trillions.