In June 2020, the California Air Resources Board unanimously adopted the landmark Advanced Clean Trucks (ACT) rule that supports increasing levels of zero emission technologies across the truck fleet in California between 2024 and 2035. The proposal will generate deep reductions in harmful pollutants, yield significant health benefits in California and beyond, and especially to California communities most directly affected by heavy truck traffic. Californians face significant air pollution and climate change challenges, and these burdens fall disproportionately on our most vulnerable residents.