It seems most comments in this thread are about microplastics. What about the poison we breath every day that comes from exhaust pipes of diesel engines as well

It seems most comments in this thread are about microplastics. What about the poison we breath every day that comes from exhaust pipes of diesel engines as well as tires/brake pads? It's already proven it's terrible for us in various ways. We already went through smoking case which is very similar. There are more and more cars and more and more health problems. It just seems like an obvious suspect to me.