Cadmium is a natural element in the earth’s crust. It is usually found as a mineral combined with other elements. All soils and rocks, including coal and mineral fertilizers, contain some cadmium. Exposure to cadmium happens mostly in the workplace where cadmium products are made. The general population is exposed from breathing cigarette smoke or eating cadmium contaminated foods. Cadmium damages the lungs, can cause kidney disease, and may irritate the digestive tract.

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