What was a primary use of chlorofluorocarbons (CFCs) before their ban?

Chlorofluorocarbons (CFCs) were primarily used as refrigerants in air conditioning systems due to their stability and effectiveness in transferring heat. Their low toxicity and non-flammable properties made them ideal for use in cooling devices, such as refrigerators and air conditioning units. As a result, CFCs contributed significantly to the comfort and utility of modern refrigeration technologies.

While other uses of CFCs, such as in aerosol propellants and cleaning agents, were noted, their most widespread and impactful application remained in refrigeration. This widespread use was a significant factor contributing to the rapid realization of their harmful effects on the ozone layer, leading to regulatory actions and bans in many countries to protect the environment.