Greenhouse Gases

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

Ozone hole nears record-breaking size again

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

The Pliocene called. It wants its CO2 levels back.

Greenhouse effect is observed and getting worse

NASA unveils satellite's 1st CO2 map of Earth

Biggest U.S. methane source spotted from space

Leaked U.N. report warns of 'irreversible' warming

5 things to know about the EPA's new CO2 proposal

This 90-second video sums up our CO2 problem

Earth is about to reach another terrible CO2 milestone

IKEA to curb climate change with veggie Swedish meatballs