Few humans hold more responsibility for the unfolding climate crisis than David Koch, the 79-year-old oil magnate who died this week.

Supporting indigenous people's projects could be more effective than trying to persuade the openly dismissive Brazilian government.

Democrats are seeking advice from people who once opposed action on global warming. They should be seeking accountability.

In Brazil, a struggle over the future of the Amazon is taking place. The struggle will have global impact.

The CNN debates paid a historic amount of attention to the climate crisis—but were still embarrassingly behind the curve.

Anyone who says otherwise isn't taking climate change seriously.

Jay Inslee says the next four years "is our last chance ... to do something about it." Is he right?

This crisis deserves far more than 15 minutes of airtime.

Global warming is causing mass migrations around the world. In New York, it's forcing people from their homes in quieter ways.

The dual threat of late-season river flooding and early-season hurricanes is a sign of things to come for our warming world.

More than 50,000 Americans unwittingly live within 650 feet of natural gas wells, which are poorly regulated and can leak or explode.

Over nearly three decades, Apa Sherpa has witnessed the effects of a warming climate and an overcrowded peak.

We can save millions of lives from climate change, but only if we change our own. Democrats should start acknowledging that.

Kristy Frazier has spent most of her life in a nature-lover's paradise. She never imagined it would one day turn into hell.

Mike Rosmann left seminary to become a clinical psychologist for farmers. Now, as historic flooding ravages the Midwest, he's never been more overwhelmed.

The idea that liberal democracies shielded science from politics was always flawed.

The Rainforest Action Network says it very well might be.

How a new generation of authoritarian leaders are using climate change to seize power