I always had this in mind when i lived in London. In my experience i found the combination of vehicle exhaust pollution and pollen unbearable. Somehow the vehic

I always had this in mind when i lived in London. In my experience i found the combination of vehicle exhaust pollution and pollen unbearable. Somehow the vehicle exhaust particles combine with the pollen and exacerbated my pollen allergies. I had zero allergies growing up and developed a very bad pollen allergy in south west London, then i moved to rural Dorset and i don’t have any allergies any more. Still get tons of pollen (i.e rural Dorset) but less pollution. I wonder if anyone has analysed the combination of vehicle exhaust pollution plus pollen?