CFCs, which are ozone-depleting substances, were historically used in
A
Air conditioner
B
All of these
C
Water cooler
D
Refrigerator
Correct Option:
B
Explanation
CFCs—chlorofluorocarbons—were historically used as refrigerants in refrigeration and cooling equipment, including refrigerators, air-conditioning systems, and refrigerating water coolers. When released into the atmosphere, CFCs can eventually reach the stratosphere, where ultraviolet radiation releases chlorine radicals that catalytically destroy ozone. Their ozone-depleting effect led to their international phase-out.
