''Modern Air Is a Little Too Clean'': The Rise of Air Pollution Denial

Despite report after report linking air pollution to deterioration of the lungs, heart and brain, Professor 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.
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