Trucks and other large vehicles account for 9% of vehicles on the road but contribute 21% of carbon pollution and 48% of particulate matter pollution (PM2.5) emitted by the entire transportation sector in Maryland. In 2020, California made history by implementing the first in the nation standards for cleaning up dirty, highly polluting trucks by adopting the Advanced Clean Trucks (ACT) rule. This regulation requires that vehicle manufacturers sell an increasing percentage of new zero-emission trucks and school buses. Massachusetts, New York, New Jersey, Oregon, Vermont and Washington joined California in adopting the ACT rule and Maryland can too. The Clean Trucks Act of 2023 (HB230/SB224) sponsored by Senate President Pro Tem Malcolm Augustine and Del. Sara Love would require Maryland to adopt the Advanced Clean Trucks rule in 2023.