Air Pollution


 
 
Concept Explanation
 

Air Pollution

Air Pollution:

When air contains enough harmful impurities which affect the well-being of the living and the nonliving, it is said to be polluted. We can say that air pollution is caused by the presence or excess of substances which change the physical, chemical or biological characteristics of air. The substances that cause pollution are called pollutants. Pollution can be caused either by natural causes or by human beings. The pollution from natural causes are usually beyond human control. We can lessen, if not totally eliminate, man-made pollutants.

Effects of Air Pollution:

1. Diseases:: Air pollution has resulted in different respiratory disorders in humans .These includes lung cancer, bronchitis, asthma, pneumonia etc.

2. Global Warming:  The increase in Earth's temperature is  known as  global warming.Due to emission of green house gases, there is an imbalance in the gaseous composition of the air. This has led to an increase in the temperature of the earth. This has resulted in the melting of glaciers and an increase in the sea level.

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Sample Questions
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Question : 1

Which of the following are correct :

(a) The substances that cause pollution are called pollutants.

(b) Pollution can be caused either by natural causes or by human beings.

(c) Air pollution has resulted in different respiratory disorders in humans .

Right Option : D
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Question : 2

Gas released during Bhopal tragedy was ___________________

Right Option : D
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Question : 3

In metropolitan cities like Mumbai and Kolkata, the major atmospheric pollutants are :

Right Option : A
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