At the climate talks, rich countries and poor countries are squaring off.

Outside the climate talks, activists offer their own vision for the future.

As the heads of state leave town, the real negotiations are set to begin.

Hope it’s worth it.

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

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

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

A Twitter conversation with Greg Sargent

What success at the Paris climate conference looks like.

How Ted Cruz and other Republicans are even denying the scientific consensus

Canada's Stephen Harper is out, clearing a roadblock for the Paris talks