1) Toxins 1) Banned chemicals 2) Banned contaminants 3) Banned pollutants 4) Cancer-causing compounds 5) Coolants once in wide use 6) EPA targets 7) EPA-targeted toxins 8) Highly toxic pollutants 9) Industrial pollutants 10) Landfill toxins 11) Long-lived pollutants 12) Pollutants banned in 1975 13) Some EPA targets 
See polychlorinated biphenyls (PCBs)
polychlorinated biphenyls; very persistent, toxic substances, stored in fatty tissue; previously widely used as fire-resistant dielectric fluids in transformers and capacitors; now prohibited