Carbon dioxide in Earth's atmosphere just reached a major milestone

As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels

11 alarming facts about sea-level rise

4 things to know about the Paris climate deal

CO2 emissions stall, even as economy grows

Why the Paris climate talks might actually work

What if our pain is a penguin's gain?

What is the U.S. Clean Power Plan?

3 reasons not to expect a 'mini ice age' in 2030

Exxon knew climate risks in 1981, email suggests

The Pliocene called. It wants its CO2 levels back.

Fjords hoard more carbon than we thought