Today, 95% of school buses in the United States are powered by diesel, emitting more than 40 toxic chemicals from their exhausts each day. The 24 million children who ride these school buses are exposed to five to 15 times more air pollutants than those who do not. In order to eliminate these harmful emissions, mitigate their health impacts on school-aged children, and reduce the effect of school transportation on climate change, policymakers should take action to electrify school bus fleets. This transition would be especially beneficial in regions prone to electricity supply disruptions caused by natural disasters, because electric school buses can also provide emergency backup power in the event of a grid failure. The challenge now is how to get it done – fast.