But they have a huge hill to climb to success. Here's our scorecard of the conference.

In Paris, the climate conference tackles another global threat.

The president’s Paris speech shows how much has changed since Copenhagen.

Diplomats and CEOs must find achievable long term goals at the U.N Climate Conference

The problem won't be resolved by political agreements alone.

Environmentalists have everything to lose in 2016.

Miami is sinking beneath the sea—but not without a fight.

The dwindling ice sheets of the Arctic and Antarctic

The move is the kind of declarative statement that environmental activists have long sought from a world leader