POLLUTION 1 (Meaning, types and Pollutants).pptx

Pollution

1. POLLUTION PRIMARY 5 SCIENCE

2. Learning Objectives At the end of the lesson, pupils should be able to: Define pollution. List some agents of pollution Discuss the role of human activities in the degradation of the environment Identify the causes of pollution on land, water, and air. Suggest ways of reducing pollution of the environment

3. Pollution means making the environment unsafe for plants and animals. When the air, water and land get contaminated, they become serious health hazards and security threats to man and other living organisms. Pollutants Pollutants are substances that are capable of contaminating the environment. Pollutants can be in their solid, liquid and gaseous forms.

4. Types of Pollution There are three major types of pollution, namely: 1. Land pollution 2. Water pollution 3. Air pollution

5. Class Activity 1 Discuss the role of human activities in the degradation of the environment ? Mention an area in Lagos state that is prone to Land pollution and write a letter to advise the commissioner for Health in Lagos state on how to solve it . (5 lines)

6. LAND POLLUTION Causes or Pollutants of the land This include solid refuse, chemical waste from industries, faeces , and disused bodies of old vehicles and equipment. Harmful Effects of Land Pollution 1. Abandoned refuse occupies land space and it is not pleasant to look at . 2. It also creates a home for animals that carry disease- causing organisms, such as cockroaches and flies. 3. Houseflies visit faeces left in bushes and may later transfer germs (sticking to their bodies) to uncovered human food. 4. Bodies of old vehicles, refrigerators and engines may injure children playing in an area where these are abandoned. 5. Refuse dumped at roadsides may cause vehicle accidents.

7. Control of land pollution 1. People should use proper latrines or water closets in homes, offices, markets and other public places. 2. In each home, refuse should be put in dustbins, and carried to proper collection centres , from where they should be sent to proper disposal places. 3. Materials should be recycled, i.e. waste material should be used again and again, e.g. paper and bottles . 4. Government should create more awareness to warn against l and pollution. 5. Offenders should be punished accordingly.