Mercury (Hg) is a harmful environmental toxicant, with its emissions controlled by various policies, and this study focuses on its sources in Boston, a major metropolitan area.
Measurements between August 2017 and April 2019 show that atmospheric Hg levels in Boston are relatively low but suggest that actual anthropogenic emissions might be significantly underestimated, potentially 3-7 times higher than current inventories.
The research also indicates that legacy emissions from the ocean and nonpoint land-based sources play a crucial role in the area's Hg concentrations, particularly during certain weather conditions, stressing the need for more comprehensive studies in other regions.