Question

Which of the following is normally not an atmospheric pollutant?

• A. Carbon monoxide
• B. Carbon dioxide
• C. Sulphur dioxide
• D. Hydrocarbons

Answer 1

The correct option is B Carbon dioxide

Carbon dioxide is normally not an atmospheric pollutant. It is required by green plants to carry on photosynthesis. Green plants, use carbon dioxide to synthesize carbohydrates. However, excessive release of carbon dioxide by automobiles, industries and other anthropogenic activities leads to atmospheric pollution. This is because carbon dioxide is a green house gas and is a major gas contributing in global warming.