• Production stopped in developed countries in 1970s after 1.2 x 106 tons
had been made. Australia
used 300 t/y 1975.
• PCBs are not particularly toxic (chloracne) but there have been some big accidents.
• In Melbourne: a
recreational lake is still out of bounds
for fishing due to a spill in 1975.
• In Japan: 1968 the Yusho Oil incident where PCB
oil got mixed in with rice oil.
It poisoned 1000 people
and resulted in a high incidence of
liver cancer.