Question

Explain the difference between pure air and polluted air?

Answer 1

Answer:

Explain the differences between pure air and polluted air. ... Pure air is free from germs and harmful gases. It contains 78% nitrogen, 21% oxygen and small amount of other gases and dust particles. Polluted air contains harmful gases and unwanted substances.

Answer 2

Answer:

Pure air contain 78% nitrogen, 21% oxygen and 0.03% CO2. Other gases such as argon, methane, ozone and water vapour etc, are also found in small quantities. When this air is contaminated by unwanted substance which have harmful effect on living and non-living things like nitrogen oxide, sulphur oxide, carbon monoxide, etc, is said to be polluted .