As battery-powered electric vehicles continue to make inroads in our transportation system, renewable transit advocates are also looking at hydrogen fuel cells as an additional option. Local advocates gathered Tuesday at Via Mobility Services in east Boulder. Via is a non-profit transit provider to people with limited mobility. They also run other transit services, including the HOP bus in Boulder. Via is in the process of converting much of their fleet to electric buses and they’re also looking at hydrogen vehicles as another option.