The Story Of Stuff
Did you ever stop to think about where your stuff comes from and where it goes when you're done with it? Watch this video to satisfy your curiosity.

Treehugger
An eco-oriented blog/informational/forum site.

Wikia Green
Exactly what it says on the tin - a wiki of information on going green.

Mother Earth News
The "original guide to living wisely." Lots of info on DIY/eco stuff.

One Square Foot
Save the rainforest by answering trivia questions. Seriously.

Free Rice
Help get food to the hungry by answering educational questions.