Fewer deaths and serious illnesses have occurred in the US over the past decade as a result of cleaner air, according to a new report focusing on the two most potent air pollutants: fine particle (PM2.5) and ground-level ozone (O3). However, these improvements are almost entirely due to reductions in PM2.5 pollution.Source:American Thoracic Society

From Science Daily

https://www.sciencedaily.com/releases/2019/05/190522141837.htm