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Online social networking has become part of our daily lives. Thankfully, it has also become a great way to do some good for the planet. It might seem counterintuitive, considering how much energy sites like Facebook consume as they try to support all the data of millions of users. However, when you're diligently using social networking for green activism, it's energy well spent.

Check out 15 ways you can use major social networking sites like Twitter, Facebook, MySpace, LinkedIn and more to go green.

Read the next page "Using Twitter for Keeping Up on Green."