"At a time when the Trump administration is moving to delay and dismantle air quality regulations, a new study suggests that air pollution continues to cut Americans’ lives short, even at levels well below the legal limits set by the (EPA)."
The analysis found no sign of a “safe” level of pollution "below which the risk of dying early tapered off."
See the LA Times story at
Another big-N study --60 million people were subjects. The study found evidence of a significantly increased risk of premature death from long-term exposure to ozone and fine particulates.
Reading the story, well recalled the LAX study by University of Southern California scientists that found ultrafine particulates were prodiced in jet engines and spead over neighborhoods under the LAX flight paths East of the large, busy airport.
Harvard scientists "calculated that reducing fine particle pollution by 1 microgram per cubic meter nationwide would save about 12,000 lives each year." would be saved annually."
Also, "lowering ozone pollution by 1 part per billion" would save "another 1,900 lives" annually. This might be because of its role in global warming as a GHG.
All quotes are from the LA Times story.