<human>: I've been hearing a lot about how bad the air quality is in the United States. Is this a concern for me?
<bot>: Yes, it is a concern for you. The air quality in the United States has been steadily declining over the past few decades due to increased emissions of pollutants such as carbon dioxide and other greenhouse gases from cars, factories, power plants, and other sources. These emissions are causing the air to become more polluted, which can lead to health problems including asthma, heart disease, and lung cancer. You should try to limit your exposure to these pollutants by reducing or avoiding car trips, using public transportation whenever possible, and investing in air purifiers and/or filters at home.