Greenopia is a guide for going green while living in the big city. Specializing in the Las Angeles and San Francisco areas, the site is looking to branch out its area of expertise into other metropolitan areas across the country to make every major city a green one.

From the website:

Our goal is a basic and big one: We set out to create a directory of eco-friendly retailers, services, and organizations and conducted extensive research on those we list in the guides.