Decades of U.S. air quality improvements slowing

There are a lot of days that might be in the moderate range, but the vast majority of people really are not impacted by pollution at that level,” says Kevin Cromar, director of the air quality program at New York University’s Marron Institute of Urban Management, who was not involved with the report. Pollution levels at the lower end of what the EPA considers “moderate” are actually “pretty good air quality” for most people, says Cromar. However, he says there are still many health gains that we could make by addressing our pollution.