Question

Kiran lives near a lake. However, her family sources water from outside for their needs, as the water from the lake is unusable. Explain why the lake water is unusable.

Answer 1

The lake water might be unusable because of water pollution.
It is usually caused by:
$\bullet$ oil spills
$\bullet$ dumping of industrial wastes
$\bullet$ washing clothes in water bodies
$\bullet$ bathing in water bodies