What are water pollutants? [2 MARKS]
Explanation: 2 Mark Harmful substances like sewage, toxic chemicals and silts which pollute the water are called water pollutants.
What are the causes of water pollution? How can you reduce water pollution? [3 MARKS]
a) What is water pollution? Name any two sources of water pollution. [2 MARKS] b) The terms sewage, sewers, and sewerage are interlinked with each other. Explain each of them. [3 MARKS]
What is thermal pollution? What are its effects? [2 MARKS]