Michael , about the barber----- Deisel fumes are 300 times more carcinogenic than gas fumes, you mentioned trucks-. The next generation of victims- our kids. Why you say ? All the kids are bused to school in vehicles run on diesel, now people have their groceries , mail, packages etc delivered in the neighborhood by diesel trucks, more trucks on the highways, more highways etc etc. Why do they allow diesel ? Money, just like the government allow tobacco companys to add carcinogens to cigarettes, money, more tax revenue. My 2 cents worth.