Multiple choice

Which of the following methods is not used to control water pollution?

  1. Lagoon system

  2. Use of clarifier

  3. Proper solid waste management

  4. Proper recycling of materials

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a very important method for the prevention of soil pollution. An efficient system of disposal should be developed to deal with domestic solid waste. Industrial wastes can be treated physically, chemically and biologically, until they are less hazardous.