Using 12 years of data, researchers at the Harvard T.H. Chan School of Public Health in Boston link specific air quality levels to death rates. The study, recently published in the New England Journal of Medicine, demonstrates the correlation between pollution and longevity and challenges the EPA to change their standards.

Their conclusion is that current regulations are not strict enough to prevent pollution-related deaths, while at the same time further reductions in pollution will produce a big drop in fatalities.