Heavy metal pollution is one world-wide environmental problem. It is believed that organisms in different
trophic levels are suffering from metal toxicities
Accumulation of heavy metals in organisms shows different
tolerant capabilities among aquatic food webs
and human health is under threats from exposure to heavy metals
through seafood intake
Use of leaded gasoline has caused a seven-folded increase of Pb content in ice layers in
Arctic area, and Hg pollution around Brazilian Amazon is attributed to gold fossicking
Stream waters or crop
plants were also contaminated by heavy metals which were both edible