The Phoenix Public Transit Department in Phoenix, United States, has unveiled its first set of hybrid buses, manufactured by New Flyer, as part of its commitment to operate a zero-emissions bus fleet by 2040. These hybrid buses combine a hybrid-electric motor with batteries and a biodiesel-fueled engine, resulting in improved fuel efficiency, reduced emissions, and quieter journeys for passengers. The city aims to become the most sustainable desert city globally, promoting cleaner air and sustainable travel options. Each New Flyer Xcelsior Hybrid-Electric bus can accommodate 35 seated passengers or 53 standing individuals, along with three wheelchair areas, providing accessible and efficient public transportation. The introduction of these buses is a step towards a greener future where residents can make climate-conscious decisions. Phoenix Public Transit has also received a grant to replace aging buses with battery-electric and hydrogen fuel-cell models, supporting the city's commitment to environmental sustainability and the adoption of the latest transportation technology.