JSS1 First Term Basic Science Lesson Note – Air and Land Pollution

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WEEK NINE

 TOPIC: ENVIRONMENTAL POLLUTION  

SUB-TOPIC: AIR AND LAND POLLUTION

CONTENT: 1- AIR POLLUTION

DEFINITION OF AIR POLLUTION

Air pollution is the discharge of harmful waste substances which contaminate the atmosphere. Air pollutants can be solids, liquids or gases.

Air Pollution

Air pollution is a serious problem in many parts of the world. Smokestacks pump pollution into the air, harming the environment and making it harder to breathe.

The composition of clean dry air is

Nitrogen                   –                78%

Oxygen                    –                 21%

Argon                        –               0.93%

Carbon dioxide          –              0.03%

Anything short of this is air pollution.

The major air pollutants are

1. Sulphur dioxide from motor vehicles and industrial plants.
2. Nitrogen oxides

• Carbon monoxide from exhaust pipe of cars

1. Hydrogen sulphide smell like rotten egg
2. Dust from city road and surroundings.

Sub-Topic 2: SOURCES OF AIR POLLUTION

1. Automobiles
2. Power stations
3. Industries
4. Burning of wood and vegetation for agricultural purposes
5. The decay of dead plants and animals.

 CONSEQUENCES OF AIR POLLUTION

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