The major cause $(80\%)$ of air pollution in big cities is due to

Which of the following is not produced by motor vehicles as an air pollutant in Delhi?

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?

The beauty of the Taj Mahal is endangered due to:

By the end of $2002$, which step was completed in Delhi to reduce vehicular pollution?