Q1 of 20 Page 61

Following are some statements about pollution. Which type of pollution do those express?

a. Fog seems to be appearing in Delhi during day hours.


b. Many times, vomiting and dysentery occur after eating ‘panipuri’.


c. The problem of sneezing occurs sometimes during a visit to the garden.


d. The crop does not grow up in some areas.


e. People living in the busy squares face the problems like short breathing and other respiratory problems.

(a) The pollution referred to here is air pollution.

Explanation: The fog referred to here is actually smog (Smoke + Fog). It is caused by the collection of the fine type of dust and toxic gases due to stagnant movement of air during winters.


(b) The pollution referred to here is water pollution.


Explanation: Use of water with bacterial contamination might lead to vomiting and dysentery in people. Moreover unhygienic conditions give a perfect environment for the organisms to grow.


(c) The pollution referred here is that of air pollution.


Explanation: Pollens from flowers in the garden may lead to asthma which is the cause of sneezing. Microbes in the air can also cause an allergy which leads to sneezing.


(d) The pollution referred to here is soil pollution


Explanation: Effluents from industries consisting of water with high salt concentration causes a mineral imbalance in the soil. This imbalance result in loss of fertility of the soil and crops can’t grow in these areas.


(e) The pollution referred here is that of air pollution.


Explanation: In busy squares, with the increase in human population the number of vehicles also increases. This leads to an increase in the smoke released into the atmosphere and as such the air gets polluted. People thus get respiratory problems.


More from this chapter

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1

Following are some statements about pollution. Which type of pollution do those express?

a. Fog seems to be appearing in Delhi during day hours.


b. Many times, vomiting and dysentery occur after eating ‘panipuri’.


c. The problem of sneezing occurs sometimes during a visit to the garden.


d. The crop does not grow up in some areas.


e. People living in the busy squares face the problems like short breathing and other respiratory problems.

 2

Read the passage and identify the sentences expressing types of pollution.

Nilesh is a student of std. VIII and lives in the urban area. It takes about an hour to go to the school by bus. He faces the heavy traffic of two-wheelers, four wheelers, rickshaws, buses while going to school. He is facing the problem of asthma since last few days. Doctors recommended him to stay away from urban area. Since then, his mother sent him to the village of his maternal uncle. Nilesh saw the heaps of garbage at many places in the village. The foul smell of human and animal wastes was present in many places. Blackish water with foul smell was flowing in a stream. He developed some abdominal disease within a few days.

 3

Match the pairs from ‘A’ and ‘B’ columns and explain the effect of pollution on human health.

Column ‘A’


1. Water containing cobalt


2. Methane gas


3. Water containing lead


4. Sulphur dioxide


5. Nitrogen dioxide


Column ‘B’


a. Mental retardedness


b. Paralysis.


c. Inflammation of lungs.


d. Skin cancer


e. Irritation of eyes

 4

True or false

a. Water does not get polluted by washing the cloths in running water of the river.


b. More the use of electric appliances more will be the pollution.