Sentences with phrase «when ozone exposure»

When ozone exposure decreased by 10 parts per billion — and was at a level well below the federal air quality standard — the workers were 5.5 percent more productive.

Not exact matches

A new study of 60 million Americans — about 97 % of people age 65 and older in the United States — shows that long - term exposure to airborne fine particulate matter (PM2.5) and ozone increases the risk of premature death, even when that exposure is at levels below the National Ambient Air Quality Standards (NAAQS) currently established by the U.S. Environmental Protection Agency.