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Chlorofluorocarbon Practice Test


Chlorofluorocarbons (CFCs) are synthetic chemical compounds composed of chlorine, fluorine, and carbon atoms. They were widely used in various industries for decades, particularly as refrigerants, propellants in aerosol products, and as foam-blowing agents. However, CFCs have been found to have a detrimental impact on the ozone layer in the Earth's stratosphere. When released into the atmosphere, CFCs can rise and reach the ozone layer, where they undergo a series of chemical reactions that deplete ozone molecules. This thinning of the ozone layer allows harmful ultraviolet (UV) radiation from the sun to reach the Earth's surface, leading to increased risks of skin cancer, cataracts, and harm to ecosystems. Due to their harmful effects on the ozone layer, international agreements such as the Montreal Protocol have been established to phase out the production and use of CFCs. The phase-out has been successful, and the use of CFCs has significantly decreased, leading to the recovery of the ozone layer in recent years.

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