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Problem 12 - Olympiad
What role does water vapour play in the atmosphere?
A. It helps in breaking down pollutants.
B. It is essential for the formation of clouds and precipitation.
C. It primarily provides oxygen for breathing.
D. It filters harmful UV rays from the sun.
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Correct: B
Water vapour in the atmosphere condenses to form tiny water droplets, which then aggregate to form clouds. These clouds eventually lead to precipitation like rain or snow.