Question 12 Marks
Give points of differences : Pure air and Polluted air.
Answer
View full question & answer→| Pure air | Polluted air | ||
| $1.$ | Pure air is free from disease causing microbes and harmful pollutant gases. | $1.$ | Polluted air has smoke, dust and other particles, sometimes smog also. |
| $2.$ | It has 78 % nitrogen, 21% oxygen and other gases in very small quantities such as carbon dioxide, methane, argon, ozone and water vapour. | $2.$ | Oxygen content is less in polluted air and other polluted gases such as oxides of nitrogen and sulphur also present. |