"A new study released yesterday by Resources for the Future, a Washington-based think tank, found that 47.6 million people in the United States live in an area that fails to meet the health standard for fine particle pollution, about twice the number originally thought."
EPA Staff Co-Wrote Study Linking Emissions to Death
Media Highlight from Climatewire — Sept. 13, 2018
Using Satellite Data to Fill the Gaps in the US Air Pollution Monitoring Network
This paper uses new satellite data to assess fine particulate matter concentrations and finds that 24.4 million more Americans than previously thought live in counties that do not meet the annual health standard set under the Clean Air Act.