MCEA Staff blog regularly about current environmental issues and how they relate to MCEA's work.
This week, the EPA, along with the National Highway Traffic Safety Administration, adopted new rules governing heavy-duty trucks which should significantly reduce fine particulate emissions. Notably, the new rules close the loophole which has allowed trucking companies to keep using old, dirty diesel engines basically forever by building new cabs around them. Old diesel engines are perhaps the largest single contributor to our ongoing problem with PM 2.5, those particles under 2.5 microns that tend to go deep in the lungs and are associated with poor health outcomes. This is also a significant advance for environmental justice, because disadvantaged communities tend to be located near major highways.