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Freon

Freons are a group of chlorofluorocarbons use primarily as a refrigerant[?]. Prior to their implication as a major contributor to the greenhouse effect, freons were also used as aerosol propellants[?] and to foam[?] up polymer materials.

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... words are found in many present-day languages. For instance the Thai language contains many loan words[?] from Sanskrit. Table of contents 1 Phonology ...