Earth911. com is a great resource for everything you need to know about recycling.
www.earth911.com  

One of our favorite sites and a great source for all things related to sustainability– including all kinds of information on product reviews, green news, and green technology.
www.treehugger.com

This is a fantastic source for more business-oriented news relating to sustainability. All kinds of great information and reports that cover a broad range of environmental issues.
www.greenbiz.com

Another great resource for issues related to sustainability, Earth2tech has a ton of great information focused on the CleanTech industry, news, company launches, and other valuable information.
www.earth2tech.com

The name says it all. EcoGeek explores the relationship between nature and technology with lots of great stories and coverage of new eco tech products and innovations.
www.ecogeek.com