Polly Glover realized her son had asthma when he was nine months old. Now 26, he carries an inhaler in his pocket whenever he is out and about in Prairieville, Louisiana, part of Ascension Parish. “He probably needs to leave Ascension quite frankly,” Glover said, but he has not because “this is his home and this is our family and this is our community.” The parish is part of the 137km span between New Orleans and Baton Rouge officially called the Mississippi River Chemical Corridor, more commonly known as “Cancer Alley.” The region’s air quality is some of the worst in the US,