The Roots perform at the Dow Live Earth Run for Water in Brooklyn's Prospect Park, April 18, 2010.
The pioneers of the green scene in hip-hop are inarguably Philadelphia's The Roots, who for six years running have hosted an annual Jam Session featuring four-plus hours of live music and guests like Prince, Jay-Z, Fall Out Boy and Mos Def. Moreover, the event is a forum for social activism and in 2010, helped celebrate the launch of the Green Music Group, an environmental coalition created with the help of Reverb including acts like Sheryl Crow and Maroon 5. Tour posters were printed on recycled paper, signed by the musicians and auctioned to support the cause, and all CO2 emissions were neutralized through support for renewable energy. In the past, the group have also signed and given away compost bins to fans and worked with PETA2 (the youth division of PETA) on an ad reading, "Stop the Violence: Go Veg."