John Kerry

But they expect their leaders to tell them the truth.

They expect their leaders to have the wisdom to not put them into harm's way unless

It is a legitimate threat to the United States, one that rises.

I mean, they're all sort of layers of threat.

You can have a threat, you can have a serious threat, you can have an existential threat.

I mean, there are different layers of threats.

But no matter what those layers are, people who serve want to know that the mission is clear, that the country is behind them, that they have everything they need to be able to get the job done.

Thank you.

My pleasure.

Thanks for having me.

The Paris Climate Accord set a goal to limit temperature rise to well below 2 degrees Celsius above pre-industrial levels.

John Kerry was Secretary of State during the Obama administration and a key figure in getting the agreement adopted.

Speaking with the climate news site Grist, Kerry said the world is moving toward cleaner forms of energy, like wind and solar power, just not fast enough.

World leaders plan to meet for the next climate negotiation summit a year from now in Turkey.

Jeff Brady, NPR News.