Question

list any two human activities which would lead to increase the level of pollution of water bodies .write four harmful effects of water pollution

Answer 1

The level of pollution in the water bodies is raised by:
1 Releasing wastes from industries and factories
2 Leakage of oil tankers in the water body (oil spills)
3. Overuse of chemical fertilisers and pesticides.
Harmful effects of water pollution:
1 Raise in temperature of the water body
2 Reduced levels of penetration of light and gases
3 Death of aquatic organisms
4.Spread of communicable diseases in human beings.