The study also documented higher levels of selenium and other pollutants near mining operations, which affect organisms. (climatesciencewatch.org)
A team led by epidemiologist Larry Clark of the Arizona Cancer Center in Tucson had observed lower rates of skin cancer among people with high levels of selenium. (sciencemag.org)
In the United States, Nebraska and North and South Dakota have high levels of selenium in the soil. (thehealthyhomeeconomist.com)