Ammonia May Raise Salivary Gland Cancer Risk: Study
(NY, Reuters Health, 8/9/04)

Dr. Terry A. Day of the Hollings Cancer Center at the Medical University of South Carolina in Charleston, and colleagues, used two decades worth of data to investigated a possible link between environmental factors and salivary gland cancer, which is rare, but deadly unless caught early. By matching fatal cases of this disease in South Carolina to the air pollution present in the county where the subject resided, they found that the risk of death from salivary gland cancer was greatest where ammonia levels in the air were highest—but only for white men.