John Kerry: “We need to set a timetable for substantive progress.”

you cannot just sit there anywhere and wish that things are going to be as they have been historically.

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.

Coal is the dirtiest fuel in the world, and emissions that are not captured from coal are the worst cause of the warming of the ocean.