From the Site:

What’s going to be the viral element that gets us to cut down on our collective carbon emissions? Who’s going to deliver us the iPod of cleantech? If we knew for sure, we’d be off building it, but these 10 web sites think they have the key ingredients to motivate their users to fight global warming and cut carbon. Do you think they have what it takes? Here’s our thoughts and our list of 10 green social networks you should know:

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