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प्रश्न
Write a short note on Chlorofluorocarbons.
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उत्तर
Chlorofluorocarbons (CFCs) are synthetic compounds used in aerosol sprays, refrigerators, and foam production. They cause depletion of the ozone layer by releasing chlorine atoms in the stratosphere, which break down ozone molecules. This depletion increases harmful ultraviolet radiation reaching the Earth, affecting health and the environment.
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Notes
- Chlorofluorocarbons (CFCs) are synthetic compounds used in aerosol sprays, refrigerators, air conditioners, and foam production.
- They are harmful because they release chlorine atoms in the stratosphere when broken down by UV rays. These chlorine atoms catalyze the destruction of ozone molecules, leading to ozone layer depletion.
- The ozone layer protects Earth from harmful ultraviolet radiation, so its depletion increases risks like skin cancer, eye cataracts, and damage to crops and aquatic life.
- One CFC molecule can destroy up to 100,000 ozone molecules. Due to their danger, the Montreal Protocol was signed in 1987 to phase out CFCs, replacing them first with less harmful HCFCs and eventually with HFCs, which do not deplete ozone.
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