New energy buses, Hydrogen filling stations.

Study tip: According to a recent study by SCI, buses with alternative drivetrains already account for 6.8 percent of bus sales worldwide. Hybrids overtook buses powered by liquefied natural gas, and thanks to large orders from China, electric buses take third place. Manufacturers, who still refuse to get on board with electrification, only have themselves to blame.
sci.de (study, paid content) via eurotransportmagazine.com

Reading tip: Southern Californians are complaining that hydrogen filling stations in the state are not reliable and are sometimes out of service for weeks at a time. Part of the problem may be that while FCV manufactures like Toyota and Hyundai offer free filling up, but are not responsible for the hydrogen fuel or the station.
greencarreports.com