John Kerry: “We have a lot of work to do to answer some very tough questions.”

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

no country can solve the climate crisis alone. This requires multilateralism automatically.

The reason that happened, my friend, is because Donald Trump pulled out of that agreement.

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.