Pollution - Types and Sources
ICSE · Class 9 · Geography
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What is pollution?
Which of the following is a pollutant?
Pollutants may be biodegradable or non-biodegradable. Which pair is correct?
What percentage of air supports life on Earth by providing nitrogen, oxygen and other gases?
Sample Questions
Which of the following is a primary air pollutant?
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Smoke
Primary air pollutants are directly released into the air, and smoke is one of them.
Smog means
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Smoke and fog together
Smog is a secondary pollutant formed from smoke and fog together.
Which of the following is a secondary air pollutant?
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Ozone
Ozone is a secondary air pollutant formed by reactions in the atmosphere.
Which of the following are natural sources of air pollution?
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Volcanic eruptions, Forest fires, Dust storms
Volcanic eruptions, forest fires and dust storms are natural sources of air pollution.
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