Which transportation company launched the first large-scale, commercially viable hydrogen fuel cell bus fleet that achieved over 20,000 operational hours without major maintenance issues?

The transportation industry is rapidly evolving with sustainability initiatives becoming central to product development and brand strategy. Major players are competing to reduce their carbon footprint through innovative technologies and practices. This poll tests your knowledge about a significant sustainability breakthrough that changed the trajectory of public transportation in urban environments. How well do you know the companies pioneering green transportation solutions?

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Ballard Power Systems in partnership with New Flyer Industries (2018)
BYD Auto with their K9 hydrogen model (2017)
Toyota's Sora hydrogen bus project (2019)
Hyundai's Elec City Fuel Cell fleet (2020)