Explain the differences between pure air and polluted air.

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Solution

Category

Pure air

`Polluted air

Nature It is not harmful for Human beings and animals It is harmful for human beings and animals

Definition Air which is fit for breathing is called pure air Air which is not fit for breathing is called polluted air.

Composition Pure air contains around 78% nitrogen, 21% oxygen and 0.03% carbon dioxide. Polluted air has no such definite composition of these gases.

Presence of smog

Smog is absent

Smog is present

Presence of dust

It is free of dust and suspended particles

It has dust and suspended particles

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Which of the following describes the difference between pure air and polluted air?

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Category	Pure air	`Polluted air
Nature	It is not harmful for Human beings and animals	It is harmful for human beings and animals
Definition	Air which is fit for breathing is called pure air	Air which is not fit for breathing is called polluted air.
Composition	Pure air contains around 78% nitrogen, 21% oxygen and 0.03% carbon dioxide.	Polluted air has no such definite composition of these gases.

Presence of smog	Smog is absent	Smog is present
Presence of dust	It is free of dust and suspended particles	It has dust and suspended particles