
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.