Which of the following industries plays a major role in polluting air and increasing air pollution?

Which of the following industries plays a major role in polluting air and increasing air pollution?

Q. Which of the following industries plays a major role in polluting air and increasing air pollution?

  1. Brick manufacturing industries
  2. Manufacture of gases industries
  3. Electrical appliances and electrical goods industries
  4. All of the above

Answer: All of the above.

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