1. Visible air pollutants are an eyesore. It also seems reasonable that they would be hard on sensitive people, increasing the number of asthma episodes and the like — except that studies in LA fail to bear this out.
    That said, particulate matter has to be a health threat to some degree and reasonable control measures make sense. There is a place for government regulation of air quality, but how do you keep the government beast on its leash?

  2. Very simple. I am my own EPA. When I stop behind a school bus at a traffic light and it poisons me with dense blue diesel exaust, I call the bus company (Laidlaw, most of the time) and tell them it is unacceptable. I call them again in a week or two and check whether they have done anything about it. It works.


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