1. Smog causes breathing difficulties.
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If you have asthma, smog can make your airways (breathing passages) swollen and filled with mucus. It can make you cough and wheeze, and make your chest feel tight. Protect your breathing on days when the air pollution is bad - be Smog Smart
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When inhaled— even at very low levels— ozone can cause a number of respiratory health effects. In fact, breathing smoggy air can be hazardous because smog contains ozone, a pollutant that can harm our health when there are elevated levels in the air we breathe.
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