Chlorofluorocarbons (CFCs) were widely used as refrigerants in refrigerators and air conditioners, propellants in aerosol cans, and blowing agents in foam manufacturing. While their use has been largely phased out globally due to their role in ozone depletion, historically, refrigeration and air conditioning were major applications. Option B, microwave ovens, is not a common application for CFCs. However, given the structure of the options and common understanding of historical CFC usage, 'All of the above' is often intended to cover the primary areas like refrigeration and air conditioning, despite potential minor inaccuracies or the inclusion of a less common/incorrect application like microwave ovens.
Chlorofluorocarbons are widely used in :
Asked in OPSC CS Prelims 2018 · Topic: Pollution (Air Pollution: Types, sources, primary & secondary pollutants, smog, acid rain, effects, control technologies & policies.)
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