Arsenic in water tied to breathing issues
http://www.nlm.nih.gov/medlineplus/news/fullstory_119337.html
http://www.nlm.nih.gov/medlineplus/news/fullstory_119337.html
"People in Bangladesh exposed to high levels of arsenic in drinking water were more likely to report shortness of breath in a new study than those who drank water with safer arsenic concentrations."