The Triad school district, just outside the St. Louis suburbs, hopes to replace half of its diesel fleet over 15 years.
Legislative proposals to put more electric school buses on the road failed this session but will likely be revived for 2021.
An alternative proposal would provide money for a massive diesel-to-electric conversion across the state.
A coalition of environmental groups and the state’s largest cities say all of the money should go toward electrification.
The Massachusetts Bay Transit Authority is testing five electric buses and says charging infrastructure is a barrier.