Climate change poses a major geopolitical and economic threat, reshaping coastlines, opening the Arctic, driving migration, ...

There's a particular kind of dread that comes from looking at a map of the world and realizing it no longer looks quite like ...

On Wednesday in New York, countries lined up to say they would accelerate their efforts to cut greenhouse-gas emissions. In staying away, the U.S. was all but alone. By Max Bearak and Somini Sengupta ...