Cadmium

Found in:
 * Some contacts, switches
 * Rechargeable nickel-cadmium (NiCd) batteries, e.g. in laptops
 * Used as a stabilizer in some PVC formulations, e.g. wire insulation
 * On some circuit boards in plated contacts and switches
 * Cadmium sulphide used in older CRTs’ phosphors coating

Impacts: Highly toxic to plants, animals and humans, causing kidney and bone damage at low levels, heart disease, & hypertension. Known human carcinogen. Bioaccumulative.