Researchers have long known that exposure to air pollution can cause respiratory illnesses, such as asthma. But a new study suggests that individuals who are overweight or obese breathe in up to 50% more air each day, compared with those of a healthy weight, meaning they are more vulnerable to air contaminants.To reach their findings, published in the journal Risk Analysis, investigators from the School of Public Health at the Université de Montréal in Canada, led by Dr.

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