Nearly 200 vendors and 100 speakers provided a stirring sampling of what is simmering in Pennsylvania’s rural areas as well as it is in the state’s urban strongholds. The fifth annual PA Renewable Energy and Sustainability Festival in Kempton, Berks County, sponsored by the Mid-Atlantic Renewable Energy Association, was held Sept. 17-19. A steady stream of musicians performing on a solar-powered stage provided the backdrop for seminars on solar, wind and geothermal energy, electric- and biofuel-powered cars, and a plethora of sustainable initiatives that are increasingly contributing to the greening of the state’s economy.