Write two examples of highly-polluting industries. What preventive measures can be taken to control industrial pollution?

Two examples of highly-polluting industries are cement industry and Iron-steel industry.

Following are the preventive measures that can be taken to control industrial pollution:

1. The industrial wastes should be properly treated in waste treatment plants before they are discharged.
2. More trees should be planted as trees reduce dust, smoke and other pollutants from the air.
3. The government should take strict actions against those industries which discharge higher amount of pollutants into the environment than the level prescribed by the central or state Pollution Control Boards.