The growing threats of nuclear war and environmental catastrophe make it hard to bet on the survival of our species.

Allowing polluters to trade carbon could keep poor Californians breathing unhealthy air.

"We're not going to outspend the fossil fuel industry," the 350.org founder explains. "We have to find other currencies to work in, and those are the currencies of movements."

If the earth's temperature rises by another 2 degrees celsius, our planet faces mass extinctions.

Awaiting a Keystone decision, environmentalists make a historic vow to engage in mass civil disobedience. 

There is something eerily disquieting about Antarctica, where humanity isn’t capable of enduring long.

Twenty twelve was the hottest year on record—and far past time for the president to lead on climate change.

The victories of 2012 demand we double down in the fight against global warming. 

Latinos—along with other minorities and youth—are the strongest supporters of action against climate change. It’s time mainstream enviros got the message.

In the aftermath of a superstorm, Americans are finally waking up to global warming.