More evidence of particulate pollution in Ashbourne
This is what you are breathing in!
The doorway to the (now empty) Dorothy Perkins store in Ashbourne is set back from the road (the A515 northbound) in a covered 'porch'. Nothing can fall onto the window frames on the doors except what is brought in on the air. So the thick black deposits on these window frames must be fine particles that were in the air, diffusing in from the highway.
In other words particulates.
This is what those walking past must be breathing in.
No measurement of actual particulate levels (PM2.5 and PM10) are currently being undertaken by the authority responsible for monitoring air pollution in the area - Derbyshire Dales District Council.
The cost to the NHS of poor air quaility is estimated to be £1.5 billion by 2025 and result in 1.3 million new cases of diseases like asthma. (Source; Public Health England report 'Estimation of Costs to NHS and Social Care due to the health impacts of air pollution' May 2018)