(Trent Nelson | The Salt Lake Tribune) John Macfarlane is a neurosurgeon who has become an activist against air pollution based on his personal and professional experience. Personally, two of his four children suffer health problems he blames on air pollution. Professionally, his research and a growing number of studies indicate that bad air is dangerous not only to lungs and respiratory systems, but to human brains. Tuesday, Oct. 9, 2018.
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