Explain the differences between pure air and polluted air.
Pure air
| Polluted air
|
1. Pure air contains around 78% nitrogen, 21% oxygen and 0.03% carbon dioxide.
| 1. Polluted air has no such definite composition of these gases.
|
2. Other gases such as argon, methane, ozone, and water vapours are also present in small quantities.
| 2. Polluted air has harmful gases like nitrogen dioxide, sulphur dioxide, carbon monoxide, particulate matter etc.
|
3. It is fresh and healthy for lungs.
| 3. It can cause respiratory diseases.
|