and from Treehugger:

Grind for the Green,a 100% solar-powered hip hop concert designed for and organized by youth, was held last weekend in Yerba Buena Gardens in San Francisco. This was the first year for the concert, but organizers all said that the event was so successful that they plan on hosting one next year. Power for the stage was provided by Solar Living Institute and there were booths at the event promoting local green vendors and organizations.

[Read the story at Treehugger.com]