Environmental contamination with arsenic as is a global environmental agricultural and health issue due to the highly toxic and carcinogenic nature of as exposure of plants to as even at very low concentration can cause many morphological physiological and biochemical changes. Heavy metals are naturally occurring elements that have a high atomic weight and a density at least 5 times greater than that of water their multiple industrial domestic agricultural medical and technological applications have led to their wide distribution in the environment raising concerns over their potential effects on human health and the environment. Arsenic is a widely dispersed element in the earths crust and exists at an average concentration of approximately 5 mg kg there are many possible routes of human exposure to arsenic from both . Environmental context arsenic occurs in rock fresh water and seawater organic arsenic compounds are found as natural constituents of many organisms and because some eg seafood are consumed . Arsenic pollution and toxicity arsenic as contamination in soil and water is a growing problem worldwide and millions of people face the risk of cancer and poisoning due to as in their drinking water and food supplies arsenic is both a carcinogen and a toxin and is damaging to most human organs kaiser 2001
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