Pollution

Things to remember

• Pollution is the presence of a substance that tends to affect directly or indirectly the environment or changes, degrades or spoils the environment.
• Pollution can be categorized into air pollution, water pollution, land pollution and noise pollution.
• An undesirable change in the physical, chemical or biological characteristics of air is called pollution.
• The substances which pollute the air called pollutants.
• Air pollution causes heart diseases, eye problem, cancer etc.
• Land pollution is the degradation of earth's surface. Land pollution makes the quality of soil low.
• Noise pollution does not harm the environment as much as air pollution but if affects the health of the person negatively.