A) Sulphur dioxide in the atmosphere
B) Chlorine in the atmosphere
C) Carbon monoxide in the atmosphere
D) Nitrogen dioxide in the atmosphere
Correct Answer: A
Solution :
[a] About 99% of the sulfur dioxide in air comes from human sources. The main source of sulfur dioxide in the air is industrial activity that processes materials that contain sulfur, eg the generation of electricity from coal, oil or gas that contains sulfur. Some mineral ores also contain sulfur, and sulfur dioxide is released when they are processed.
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