Mercury

Hazards of PCBs
• Affect the growth of aquatic plants;
at 0.1-1 mg/L, reduce photosynthesis;
at 10-100 mg/L, inhibit the growth of aquatic plants.
• Most species of fish are senstitive to PCBs during all stages
of their growth. 。
• The absorbtion of PCBs by birds can cause the expansion
and damage of liver and kidney, internal bleeding, collapse
of lien and thickened eggshell, etc.
• PCBs can induce a series of symptons to mammals such as
adenoma and cancer.
• PCBs can cause skin ulcers, acnes, hydatoncus, liver
damage and the increase of leukocytes, etc. Except causing
cancers, PCBs can also be spread to infants and cause
monstrosity.