Today is the second day of Air Quality Awareness Week. Air pollution can make asthma symptoms worse and trigger attacks. If you or your child has asthma, have you ever noticed symptoms get worse when the air is polluted? Air pollution can make it harder to breathe. It can also cause other symptoms, like coughing, wheezing, chest discomfort, and a burning feeling in the lungs. Two key air pollutants can affect asthma. One is ozone (found in smog). The other is particulate matter pollution (found in haze, smoke, and dust). When ozone and particulate matter pollution are in the air, adults and children with asthma are more likely to have symptoms.