Mark Ruffalo Wants You to Imagine a 100 Percent Clean Energy Future

Mark Ruffalo at a New York City anti-fracking demonstration in 2010. Bryan Smith/ZUMA

The celebrity activist isn’t just against fracking; he wants to turn the conversation to green solutions.

This Woman Took Your Picture…From Saturn

Earth as glimpsed past Saturn in one section of the stunning "The Day the Earth Smiled" image taken by the Cassini spacecraft. NASA/JPL/SSI/CICLOPS/Wikimedia Commons

Planetary scientist Carolyn Porco on the Cassini spacecraft, the possibility of life on Saturn’s moons, and seeing Earth from distant space.

Why Obamacare Could Produce More Atheists

00000kim00000/Flickr

And other surprising psychological findings about why some people (but not others) reject religion.

PHOTOS: 2013′s Most Terrifying Weather Disasters

California Wildfires 2013 - Rim Fire

Many may be harbingers of a changing climate.

How Beyoncé Is Saving the Planet With Her New Album

Courtesy Columbia Records

Purchasing “Beyoncé” online instead of on CD could cut greenhouse gas emissions by up to 80 percent.

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About Climate Desk

The Climate Desk is a journalistic collaboration dedicated to exploring the impact—human, environmental, economic, political—of a changing climate. The partners are The Atlantic, Center for Investigative Reporting, Grist, The Guardian, Huffington Post, Mother Jones, Slate, and Wired.