Multiple choice The CFC pollution sources include� Jet air crafts only Fire extinguishers and jet air crafts Refrigerators and jet air crafts All of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation CFCs (Chlorofluorocarbons) are released from multiple sources including refrigerators, air conditioners, fire extinguishers, and jet aircraft aerosols. All these applications historically used CFCs, which contribute to ozone layer depletion.