5th Class Science Our Environment Air Pollution

Air Pollution

Category : 5th Class

*       Air Pollution

 

Overpopulation, industrialization, modern life style and advancement in science technology has lead to the thoughtless use of natural resources, which in turn spoil air for other activities. This is called air pollution.

Look at the following picture of the causes of air pollution

 

Look at the following picture of the causes of air pollution

Deforestation is one of the big causes of air pollution. Trees are the natural air purifier. Deforestation increase the concentration of carbon dioxide in the air and thereby pollutes it.

Eruption of ash from the volcano causes air pollution. Concentration of carbondioxide, hydrogen chloride and sulfur dioxide increases due to the eruption from volcano

.

Indoor pollutants which are responsible for the air pollution, given in the picture above. We can minimize the pollution by using non polluting elements instead of the given elements.  

 

* Consequences of Air Pollution

                             

Taj mahal is corroded due to acid rain                               Hole in the ozone layer

Taj mahal is corroded due to acid rain and hole in the ozone layer, which allows harmful ultra violet radiations to pass through it are the consequences of air pollution.

 

*       Air Pollution Causes Diseases

Pollution can cause itching and irritation to eyes, skin, nose, throat and the respiratory tract.

Pollution causes itching in eyes

 

Many respiratory problems Asthma, Bronchitis occur due to inhalation of poisonous gases.

    

                 Respiratory problems

 

Pollution is injurious to plant or other animal also.

Polluted air can damage lungs.

It reduces visibility because of the presence of smoke, dust and vapors.

Pollution can damage our nervous system and digestive system.

Pollution can cause cancer and neurological disorder.  

 

*        How to Minimize Air Pollution

Look at the following chart to understand the method by which, we can minimize the air pollution:

Use electric vehicle to reduce release of harmful gases in the air

 

CNG bus ? an eco-friendly bus

Government has encouraged people to use LPG over coal and fire wood for cooking purposes as it improves air quality and can reduce air pollution.

Grow more trees to make earth green   Trees minimize the air pollution. Therefore, we should grow more tree to make the earth green and pollution free.

 

 

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   If there would be no ozone layer, then which harmful products would not be screened by the atmosphere?

(a) Smog

(b) UV rays

(c) IR rays

(d) All of these

(e) None of these

 

Answer: (b)

Explanation: Ozone layer in the stratosphere layer of the atmosphere filters the ray of UV to come on the surface of the earth. Due to air pollution ozone layer is depleting, hence allowing UV rays to enter into the earth's atmosphere. Therefore, option (b) is correct and rest of the options is incorrect.

 

 

       It is not advised to take bath in the first rain because of which one of the following?

(a) Bases fall along with the rain due to air pollution

(b) Greenhouse effect

(c) Global warming

(d) Harmful toxic gases from the factories combine with the condensing water vapors

(e) All of these

 

Answer: (d)

Explanation: Harmful toxic gases from the factories combine with the condensing water vapors. Hence, it is not advised to take bath

in the first rain. Therefore, option (d) is correct and rest of the options is incorrect..

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