Based in Washington, DC, the Green Business Network is an offshoot of Green America and works to create a networking and resource opportunity for social and environmental companies in the United States. There are over 5,000 businesses and enterprises that belong to the network and many of them you have likely already heard of including Clif Bars, Organic Valley, Seventh Generation and Guayaki Organic Yerba Mate.
It's a certification system akin to B Corporations in which consumers can make decisions based on whether or not a product or service has the Green America Seal of Approval. The organization calls itself "the nation's first and largest network of socially and environmentally reponsible businesses."
Green Business Network website
Green Business on Facebook
Green Business on Twitter
Green Business on LinkedIn