Glossary Terms Arsenic A metal widely distributed in nature and found mostly in water.
Industrial contamination is the primary source of airborne arsenic.
Active smelters may be a source of high exposure to arsenic fumes and dust. The manufacture of pesticides and other agricultural products is the major source of occupational exposure. Arsenic has been associated with skin cancer, lung cancer, peripheral vascular disease and liver injury. Reproductive effects have been noted in animals.