Editor’s Note: This article was updated with new findings as of October 2024 from WRI’s Electric School Bus Data Dashboard, which is updated monthly and contains the most recent data on electric school bus adoption. Previous versions of this article are available for download at the bottom of this page. More than 21 million children ride the bus to school in the U.S., and over 90% of these school buses run on fossil fuels, primarily diesel, putting children’s health at risk every school day.