Cara and Cailey Asthma is only one of many health problems related to air pollution. But it’s a big one. According to statistics compiled by the American Academy of Allergy, Asthma, and Immunology , approximately 34 million Americans have been diagnosed with asthma; 9 million of those are children under 18. Asthma is responsible for 13 million missed school days per year, and it is the third ranking cause of hospitalization for children under age 15. Asthma is not exactly easy on the American economy, either. Total asthma-related expenses are about $6.6 billion per year; of this, a group of...