Meet Tommy Allred. He lives in Midlothian, TX, a town of fewer than 10,000 roughly 18,000 residents that also hosts three of the nation's most polluting cement plants.
Like millions of kids across the U.S., Tommy has asthma. He developed the condition after his family moved to Midlothian, when he was two years old. First it was pneumonia, then double pneumonia, bronchitis, fever, and inexplicable coughing followed by shortness of breath.