Production of PCBs was discontinued in 1977, yet PCBs are still found in the environment. The reason for this is
A. PCBs are formed naturally by plants and animals.
B. PCBs are very stable molecules.
C. PCBs are very reactive molecules.
D. PCBs are imported from other countries where their production is not banned.
Answer:B
Production of PCBs was discontinued in 1977, yet PCBs are still found in the environment. The reason for this is
A. PCBs are formed naturally by plants and animals. B. PCBs are very stable molecules. C. PCBs are very reactive molecules. D. PCBs are imported from other countries where their production is not banned.