F ig 5.4 Biogeochemical cycling of cadmium. Extemal inputs to atmosphere; coal and oil combustion, cement production, industrial e.g. cadmium produc-tion. To lithosphere/hydrosphere; electroplating, phosphatic fertilizers, pig-ments, sewage, stormwater. Sources; references 1,6,14,22,34,37,42,46,50