Answer the following questions.

Which measures are necessary for arresting pollution?

The measures which are necessary for arresting pollution are:

i. More and more forests and plants should be grown to reduce pollution.

ii. It should be made compulsory for every industry to use the waste before letting it out of industries.

iii. There must be some changes in the chemical processes so that they can produce less harmful chemical substances.

iv. To reduce the harm caused by air pollution, industries should be established away from main cities.

v. The height of the chimneys should be increased.