Question

Match the following air pollutants in accordance with their environmental effects.

A.Chlorofluorocarbons	E. Acid rain
B. Carbon dioxide	F. Reduces the ability of blood to carry oxygen
C. Sulphur dioxide	G. Green house effect
D. Carbon monoxide	H. Damage ozone layer

• A.
  A-F, B-H, C-G, D-E
• B. A-H, B-G, C-E, D-F
• C. A-G, B-E, C-F, D-H
• D. A-E, B-F, C-G, D-H

Answer 1

The correct option is B A-H, B-G, C-E, D-F

• The use of CFCs in refrigerators, air conditioners etc. contaminates air by depleting the ozone layer that causes harmful ultraviolet rays to reach the Earth.
• Incomplete combustion of fuel releases carbon monoxide. Carbon monoxide mixes more easily with haemoglobin than oxygen, hence the capacity of blood to hold oxygen reduces.
• Oil refineries emit sulphur dioxide that reacts with water vapor present in the air, producing sulphuric acid that causes acid rain.
• Increased amounts of gases such as carbon dioxide in the atmosphere cause the greenhouse effect. These gases trap the Sun's heat, causing a gradual increase in the Earth's atmosphere temperature.