The ____________ pollutants are volcanic eruptions, wind erosion, pollen disposal, evaporation of organic compounds, and radioactive elements.
A
man-made
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B
natural
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C
synthetic
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D
geographical
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Solution
The correct option is B natural The pollutants are classified as natural and man-made. The natural pollutants are volcanic eruptions, wind erosion, pollen disposal, evaporation of organic compounds, and radioactive elements. Man-made pollutants are vehicular emission, industrial wastes, smoke from thermal power plants, and refineries.