Question

Which of the following is the main source of water pollution discharged by the industry ?​

Answer 1

Answer:

The discharge of chemicals as well as heavy metals through industries and factories are the major sources of water pollution. It is reported that one of the largest sources for this is untreated sewage, discharge into rivers that ultimately affects environment and thus, finally human beings.

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Answer 2

a)mercury,b)lead,c)cadmium,d)all of these