The air we breathe in modern times can no longer be said to be 'fresh'. With every breath that we take, we inhale billions of molecules of pollutant chemicals. Some man-made sources of pollution are mentioned here. Select the least controllable one.

Domestic cooking

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Chemical and other industries

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Motor cars and other vehicles

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Thermal power plants

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Solution

The correct option is C Motor cars and other vehicles
Motor cars and other vehicles are least controllable as time passes, population increasing thereby increasing the number of vehicles resulting in an increase in amount of pollution.

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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.

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The air we breathe in modern times can no longer be said to be 'fresh'. With every breath that we take, we inhale billions of molecules of pollutant chemicals. Some man-made sources of pollution are mentioned here. Select the least controllable one.

The correct option is C Motor cars and other vehiclesMotor cars and other vehicles are least controllable as time passes, population increasing thereby increasing the number of vehicles resulting in an increase in amount of pollution.

The correct option is C Motor cars and other vehicles
Motor cars and other vehicles are least controllable as time passes, population increasing thereby increasing the number of vehicles resulting in an increase in amount of pollution.