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DDT (Dichloro-diphenyl-trichlometane)

An insecticide discovered in 1939 by the Swiss chemist Paul Miller. It was useful to control mosquitos and the spread of malaria, but is highly toxic, and it wasn"t known at the time that it persists in the environment and in living tissue.

It has long been banned in many countries, but the manufacturers have reduced the original price of $1.19 a pound to 17 cents a pound, which explains its continued use. See 'Pesticides'

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