Jakob von Essen, who came from Sweden to intern with Bay Area 

Jakob von Essen, who came from Sweden to intern with Bay Area Green Tours, gestures toward a crowd as he rides a Rock The Bike "One Bike/One Speaker," a bicycle that generated power for the sound system at rally to support fossil fuel divestment outside of City Hall in San Francisco, Thursday, May 2, 2013. (AP Photo/Jeff Chiu)
Associated Press
Jakob von Essen, who came from Sweden to intern with Bay Area Green Tours, gestures toward a crowd as he rides a Rock The Bike "One Bike/One Speaker," a bicycle that generated power for the sound system at rally to support fossil fuel divestment outside of City Hall in San Francisco, Thursday, May 2, 2013. (AP Photo/Jeff Chiu)
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