When air is contaminated by substances which have a effect on both the and , it is referred to as . (air pollution, harmful, living, unwanted, non-living, pollutants).

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Solution

Air Pollution:
“The presence of harmful chemicals in the air that makes it unfit for humans, plants, and animals is called air pollution.”
The effect of air pollution is observed on both living and non-living substances.
“When air is contaminated by unwanted substances which have a harmful effect on both the living and the non-living, it is referred to as air pollution.”
The substances which contaminate the air are called air pollutants.
Causes of air pollution:
Vehicles
Industries and factories
Burning of fuels, wood, etc.
Hence, when air is contaminated by unwanted substances which have a harmful effect on both the living and non-living, it is referred to as air pollution.

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Answer in brief :

(a) Name the components of the environment.

(b) For which purposes is water used on a large scale?

(d) How does air get polluted?

(e) Explain the effects of a polluted environment.

(f) How was garbage of a village or town disposed of in the past?

Q. Fill in the blanks with the help of words given in bracket after each sentence.

(a) When air is contaminated by ________ substances which have a ________ effect on both the ________ and ________, it is referred to as ________.

(air pollution, harmful, living, unwanted, non-living, pollutants).

(b) Many ________ are responsible for causing ________ pollution. Petroleum ________ are a major source of ________ pollutants like ________ and ________.

(sulphur dioxide, refineries, industries, nitrogen dioxide, gaseous, liquid, people, air)

(tap, liters, brushing, washing, drops)

(d) Water which is suitable for _________ is called ________ water.

(washing, bathing, drinking, potable, soft)

(e) Water which looks clean still has disease-carrying ________ and ________ impurities.

(insects, microorganisms, particles, dissolved, harmful).

Question 21
Fill in the blanks with the help of words given in bracket after each sentence.
(a) When air is contaminated by___ substances which have a ___ effect on both the ___ and ___, it is referred to as ___. (air pollution, harmful, living, unwanted, non-living, pollutants).
(b) Many ___ are responsible for causing ___ pollution. Petroleum ___ are a major source of ___ pollutants like ___ and ___. (sulphur dioxide, refineries, industries, nitrogen dioxide, gaseous, liquid, people, air).
(c) While ___ your teeth, leaving the ___ running may waste several ___ of water. (tap, litres, brushing, washing, drops)
(d) Water which is suitable for ___ is called ___ water. (washing, bathing, drinking, potable, soft).
(e) Water which looks clean still has disease carrying ___and ___ impurities. (insects, microorganism, particles, dissolved, harmful).

Question 1

(a) Is Air said to be polluted when it is contaminated with unwanted or foreign substances?

(b) Mention one man-made activity that leads to air pollution.

Air is contaminated by unwanted substances that have harmful effects on both living and non-living objects. This is mainly called as _____________.

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When air is contaminated by ________ substances which have a ________ effect on both the ________ and ________, it is referred to as ________. (air pollution, harmful, living, unwanted, non-living, pollutants).

When air is contaminated by substances which have a effect on both the and , it is referred to as . (air pollution, harmful, living, unwanted, non-living, pollutants).