COP23

Non-governmental coalitions stepped up in the U.S.'s relative absence at COP23 this year. Is their activism the only thing keeping climate change at bay in America?

• By Benjamin Powers

Officials from the alliance hope to more than double their number by next year's meeting.

• By Emily Moon

The country presiding over the United Nations climate summit rotates every year, but experts say location matters less than leadership.

• By Kate Wheeling

While diplomats travel to Germany, we're sending our reporter to the front lines.

• By Ted Scheinman