It is official at the EPA (and elsewhere) - air pollution is good for you.
https://www.theguardian.com/environment/2017/nov/16/modern-air-is-too-clean-the-rise-of-air-pollution-denial" 'Modern air is too clean': the rise of air pollution denial
US sceptics are questioning the science behind air pollution and mortality, a trend that is starting to appear in countries where the air is much more toxic.
Despite report after report linking air pollution to deterioration of the lungs, heart and brain, Prof Robert Phalen believes the air is “too clean” for children.
After all, everybody needs a bit of immune-system-boosting dirt in their lungs.
“Modern air is a little too clean for optimum health,” he told the American Association for the Advancement of Science (AAAS), one of the world’s largest scientific societies, in 2012.
“My most important role in science is causing trouble and controversy,” he added.
Now the director of the air pollution health effects laboratory at the University of California, Irvine, is set to be appointed as a scientific adviser by Donald Trump’s Environmental Protection Agency (EPA). ".
And so it goes on.