In a study published in March, 2025 in Science of The Total Environment, researchers from the University of North Carolina’s Institute for the Environment report on the impacts of onroad vehicular emissions within the Boston metropolitan area. The dramatic results point to “substantial variation in health damages per ton of emissions…observed across precursor pollutants, source regions, and vehicle classes, underscoring the need for targeted emission reduction strategies.
This study highlights the importance of high-resolution air quality modeling to accurately capture intra-urban health impacts and inform effective policymaking…[It] presents novel estimates of health impacts from the onroad sector within the Greater Boston region using high-resolution emissions and dispersion modeling, using an innovative methodology to link premature deaths to specific types of pollutants originating from distinct sources for a major urban region like Greater Boston. We estimated approximately 342 premature deaths annually from on-road transportation sources in this region, the vast majority of which were attributable to NO2 concentrations. Furthermore, we identified differences in health damages per ton between inner core and suburban regions, with patterns that varied considerably across pollutants (e.g., damage per ton of PPM that was three times higher in the inner core than suburban regions) and to a lesser extent across vehicle classes.”
Read the full report.