SEPTA, the transit authority in Philadelphia, is planning to test hydrogen fuel cell buses as part of a pilot program to transition to a zero-emissions fleet by 2040. The initiative involves introducing 10 hydrogen buses to evaluate their performance on various routes within Philadelphia and its suburbs. The project aims to assess the role of hydrogen in decarbonizing the transportation sector and compare it with battery electric buses. SEPTA officials are optimistic about the potential of hydrogen buses on suburban routes with longer distances and hilly terrains. The project's first phase will involve comparing the hydrogen buses with the current diesel hybrid fleet and then with battery electric buses. Despite previous challenges with battery electric buses, SEPTA sees them as suitable for city routes, while hydrogen buses may be more efficient in suburban areas. The use of hydrogen for fueling the buses comes with a hefty cost, with a contract signed with Plug Power for hydrogen supply. However, the project has faced criticism from environmental advocacy groups like the Delaware Riverkeeper Network. Concerns have been raised regarding safety, transparency, and the environmental impact of hydrogen production. Despite these concerns, SEPTA aims to move forward with the pilot to explore sustainable transportation options. The project represents a step towards a greener future for public transportation in Philadelphia.