My paper with is now public as an working paper! We use satellite data to show that 24 mill. people are in areas that exceed Clean Air Act stds for PM2.5 but were missed by ground-based monitors and misclassed as "attainment".
When satellite data is used to supplement ground air-quality monitors, it reveals that 24.4 million more Americans than previously thought are suffering unhealthy air.
Satellite data show that a total of 47.6 million people live in areas that fail to meet the standard, rather than 23.3 million as currently thought. #CleanAirAct #AirPollution