The main source of chlorofluorocarbons (CFCs) in the atmosphere is:

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CFCs were widely used as refrigerants (Freon), propellants in aerosol sprays, foam blowing agents, and solvents. They are chemically stable in the troposphere, drift to the stratosphere where UV breaks them, releasing Cl atoms that destroy ozone. Automobiles emit CO₂, NOx. Volcanoes emit SO₂. Fertilizers lead to N₂O.

The main source of chlorofluorocarbons (CFCs) in the atmosphere is: MCQ with Answer and Explanation

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