Which one of the following statement pertaining to pollutants is correct?
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a
DDT is a non-biodegradable pollutant.
b
Excess fluoride in drinking water causes osteoporosis, hardening of bones, stiff joints.
c
Excess cadmium in drinking water causes black foot disease.
d
Methylmercury in water may cause "Itai Itai" disease.
answer is A.
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Detailed Solution
Excess fluorine in drinking water causes hardening of bones and stiffness of joints. Black foot disease is due to arsenic.Itai - Itai disease is due to cadmium in contaminated water.