Saving the Hollywood sign, finding the best greener celebrity websites, making fun of Monsanto, and tracking endangered sharks and tigers.

Breakthrough 'crystal' captures CO2 and could one day turn it into a fuel or turn water into hydrogen.

Conservancy marine scientist Meaghan Johnson dives to survey the damage to coral reefs off Florida's coast and tells us what it means for reef resilience.

New analysis of basalt rock formations on the Eastern Seaboard of the U.S. reveals the possibility of cleaner coal.

Rolling Stone uncovers the polluters and deniers holding back efforts to fight global warming, Germany steps up its emissions cutting game, and Michael Pollan has some new easy rules for healthy eating.

What does a ton of CO2 look like and how much is being pumped into the air right now?

Here's why six greenhouse gases were classified as pollutants that threaten the health and welfare of Americans, and what that means for you.

Grist's David Roberts thinks Annie Leonard doesn't really understand the real Story of Cap & Trade.

This is the first in a series that examines both the promise and the pitfalls of the upcoming climate talks in Copenhagen.

Two art projects attempt to put shape (and color) to that invisible foe -- carbon dioxide.