Clean Diesel: Overcoming Noxious Fumes

Diesel engines, known for powering most heavy-duty trucks and transit buses, have long been a source of pollution, contributing to air quality and public health problems through nitrogen oxides (NOx) and particulate matter emissions. To address these issues, states implement stringent emission standards, promote the use of low-sulfur fuels, and invest in advanced technologies such as particulate filters, selective catalytic reduction, and hybrid electric drivetrains. However, balancing emission reduction with diesel engines' efficiency remains a challenge, and policymakers must navigate this complexity while ensuring economic and environmental sustainability.