Recommended Reading / Viewing. 1  Your engine manufacturer's operating instructions. 2  Mixture Magic (John Deakin) 3  EGT, CHT, and Leaning (Mike Busch) 4  Leaning Basics (EAA/Mike Busch) (video) 5  Leaning: The Advanced Class (EAA/Mike Busch) (video)
PCBs are a probable human carcinogen. Studies of PCBs in humans have found increased rates of melanomas, liver cancer, gall bladder cancer, biliary tract cancer, gastrointestinal tract cancer, and brain cancer, [1] and may be linked to breast cancer. PCBs are known to cause a variety of types of cancer in rats, mice, and other study animals. [2].
Exposure of one form of PCB to rats resulted in retarded growth, delayed puberty, decreased sperm counts, and genital malformations. [7] In other studies, exposure of PCBs to rats in utero led to behavioral and psychomotor effects that lasted into adulthood.