• Ozone is a pollutant, but the ozone layer in the stratosphere protects us from harmful solar rays.
  • chlorofluorocarbons (CFCs) were widely used in spray cans, refrigerators, and many other products.
  • CFCs are stable compounds that can remain in the atmosphere for hundreds of years.
  • Sunlight breaks apart the molecules.
  • This releases their chlorine ions (Cl) This breaks down the ozone molecules into an oxygen molecule and an oxygen ion.
  • One CFC molecule can break down as many as 100,000 ozone molecules in this way.
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