Which one of the following statements pertaining to pollutants is correct?

Options

A. DDT is a non-biodegradable pollutant
B. excess: fluoride in drinking water causes osteoporosis
C. excess cadmium in drinking water causes black foot disease
D. methylmercury in water may cause "Itai Itai" disease.

Answer

A

Explanation

Non-biodegradable pollutant: a pollutant which retains its toxicity for extermely long periods of time. Some lead and mercury compounds, certain chlorinated hydrocarbon pesticides (e.g., DDT) and radiactive substances are nonbiodegradable pollutants. Ostcoporosis is a condition that is characterized by a decrease in bone mass and density, causing bones to become frangile. Blackfoot disease (BFD) is a severe form of peripheral vascular disease (PVD), in which the blood vessels in the lower limbs are severely damaged, resulting eventually in progressive gangrene. It has been observed in Taiwan. Itai-itai disease is a chronic cadmium poisoning with renal tubular dysfunction followed by osteomalacia.