In connection with the improvement of combustion engines and particle filters, more and more particulate matter is due to tyre abrasion. By the way, electric cars that are heavier also emit much more particulate matter.
But here are finally some good news! Students of the Imperial College in London have invented a device that is installed around the tyres and can prevent up to 60% of particulate matter. Even better: particulate matter can be recycled and used for sound insulation or 3D printing. The fine dust problem is definitely not swept under the carpet!