Have any been proven safe?
I'm living proof that asbestos is safe. 40 years ago for aprox. 10 years I consumed may pounds of dry asbestos fines every day, I have smoked for over 50 years and have very good lungs. I also have a file of over 2000 asbestos comp claims that were filed when the men applied for union retirement and were sent directly to the union lawyers to file their asbestos claims and to this day I don't know of one of them that had a valid claim.
As long as universities are allowed to do research we will live with crap science.