The device which can remove particulate matter present in the exhaust from a thermal power plant is:

In metropolitan cities like Mumbai and Calcutta,the major atmospheric pollutants are

In almost all Indian metropolitan cities like Delhi,the major atmospheric pollutant$(s)$ is/are

Steps taken by the Government of India to control air pollution include:

Consider the following statements about a scrubber:
$I.$ It is used to remove gases like sulphur dioxide from industrial exhaust.
$II.$ In a scrubber,the exhaust is passed through a spray of water or lime.
$III.$ Water dissolves gases and lime reacts with sulphur dioxide to form a precipitate of calcium sulphate or calcium sulphide.
Which of the statements given above are correct?

In which year was the Air (Prevention and Control of Pollution) Act amended to include noise as air pollution?