USA.com chart using EPA data:
Total Suspended Particulate (TSP)
Tiny airborne particles or aerosols that are less than 100 micrometers are collectively referred to as total suspended particulate matter (TSP).
The increase goes up in an almost vertical climb from 2008 until data is no longer available after 2009. The U.S. mean TSP was slowly going down at the time.
I don't believe the EPA uses TSP for regulatory purposes anymore - they focus on a subset of particle sizes that penetrate the lungs deeply, but I would think dramatically increasing levels of general TSP could have an effect on public health, including possibly reducing vitamin D levels:
http://www.hcdoes.org/airquality/Monitoring/tsp.htm
Another source of TSP not mentioned in the previous source.
Total Suspended Particulate (TSP)
Tiny airborne particles or aerosols that are less than 100 micrometers are collectively referred to as total suspended particulate matter (TSP).
The increase goes up in an almost vertical climb from 2008 until data is no longer available after 2009. The U.S. mean TSP was slowly going down at the time.
I don't believe the EPA uses TSP for regulatory purposes anymore - they focus on a subset of particle sizes that penetrate the lungs deeply, but I would think dramatically increasing levels of general TSP could have an effect on public health, including possibly reducing vitamin D levels:
http://www.hcdoes.org/airquality/Monitoring/tsp.htm
Impair visibility and reduce solar radiation. (Very small particles remain suspended in the air for long periods of time, and also effectively scatter light. The haze caused by these particles can affect crop productivity by reducing solar radiation; it can also adversely affect property values; aesthetics in urban, country-side and wilderness areas; transportation safety; and potentially the weather.)