This unprecedented triumvirate is generating some real momentum toward climate action.
The pope's speech took an unashamedly political tone during his first public event of a six-day visit to the U.S.
Under pressure from activists and rivals, Clinton now says Keystone XL would be bad for the climate.
A human-chain blockade brings together a coalition spanning immigration rights and the environment.
… and 4 reasons why you still shouldn’t get your hopes up too much.
Watch out for the snowballs, Your Holiness.
A new study finds that people pay the most attention to climate stories when they feature individuals who are making a difference.
The oil giant's spinmeisters are trying to discredit a series of articles about the company's climate research and its refusal to take serious climate action.
The automaker has made it that much harder for any company to convince people that it supports sustainability.