This is the second installment in a two-part series. Read part one -- "What does it take to turn a city green?" -- here.

Following the success of Lancaster Mayor Rex Parris' alliance with Chinese electric vehicle and solar storage company BYD, the town has gone gung-ho for renewables: all new houses built in the city are required to include solar panels, street lights have been replaced by BYD’s LED bulbs, and almost every public building is powered by solar, from City Hall to the minor-league baseball stadium. The day I’m in town, they’re trialling another first for North America: electric vehicle chargers purpose built by German company EV Charging to hook into street lamps, a system designed to mitigate both infrastructure costs and the “range anxiety” associated with electric vehicles.