Briefly explain (a) Air Pollution, (b) Water pollution, and (c) Land pollution.
Air pollution is the result of a combination of factors which lowers the air quality. It is mainly caused by carbon monoxide emitted by automobiles and smoke and other chemicals from manufacturing plants. It has created a hole in the ozone layer, leading to dangerous warming of the earth.
Water pollution occurs primarily from chemical and waste dumping. Business enterprises have been dumping waste into rivers, streams and lakes with little regard for consequences. This has led to the death of several animals and posed a serious threat to human life.
Land pollution is caused by dumping of toxic wastes on land. This damages the quality of land, making it unfit for agriculture or plantation. Restoring the quality of land that has already been damaged is a big problem.
Explanation
The textbook clearly defines all three types of pollution under section 6.6.1 'Causes of Pollution'. Each definition includes the causes and consequences. Air pollution results from automobiles and manufacturing plants affecting the ozone layer. Water pollution stems from industrial waste dumping affecting animals and humans. Land pollution arises from toxic waste dumping degrading land quality for agricultural use.