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Blowing agents are chemicals used in the production of expanded polystyrene (EPS) to create foam by generating gas bubbles within the polymer matrix. Traditionally, chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and other halogenated compounds have been widely used as blowing agents. These substances, however, have severe environmental and health implications. One of the most significant harmful effects is their contribution to ozone layer ____ ________ ____ ____ _____ ___ ____ ________ ____.
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