Freon is a brand name for a group of chemicals known as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). These substances are commonly used as refrigerants in air conditioning systems and refrigerators. Freon helps to cool air by absorbing heat and is essential for the operation of many cooling appliances. However, the use of Freon has decreased due to its harmful effects on the environment, particularly its role in depleting the ozone layer. As a result, many countries have phased out or restricted the use of Freon, leading to the development of alternative refrigerants that are more environmentally friendly.