As the United States leaves the Paris Agreement, how will the leadership vacuum be filled? Will China continue to surge ahead, tackling air pollution and investing in renewable energy? Will India soon abandon its commitments, favoring coal development over clean air? If choices that individual...

As scientists have slowly come to grasp the seriousness of climate change, many have begun to doubt that humans can transition away from fossil fuels fast enough to avoid serious ecological collapse on land and in the oceans. Some researchers have suggested that we should take unusual measures to...

The principal solution to climate change challenges lies with a transformation to an all-of-the-above low carbon energy future. There is no going back. Clean energy technologies have become remarkably competitive in just the last few years. The US is already on a trajectory for meeting our Paris...