Today Proterra announced that San Francisco International Airport (SFO) has purchased six 40′ Proterra Catalyst E2 electric buses and three 60 kW Proterra plug-in chargers, joining a growing list of airports across North America transitioning to electric buses for airport ground transportation. SFO expects to purchase additional battery-electric buses to replace its CNG vehicles, for a greener, more modern fleet. click here possible to reach millions worldwideGoogle News, Bing News, Yahoo News, 200+ publicationsSFO joins other California airports that are leading the electrification trend across ground transportation fleets, including Sacramento International Airport (SMF) and Silicon Valley’s Norman Y. Mineta San José International Airport (SJC). Beyond California, five additional airports across the country have chosen Proterra electric vehicles for their ground transportation needs, including Raleigh-Durham International Airport (RDU), Honolulu International Airport (HNL), John F. Kennedy International Airport (JFK), Newark Liberty International Airport (EWR) and LaGuardia Airport (LGA). “San Francisco International Airport has long been a leader in sustainability and joins other forward-thinking airports around the country in transitioning ground fleets to 100 percent battery-electric buses,” said Proterra CEO Ryan Popple.