Ozone Hole Study and Impact on Antarctica
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Questions and Answers

What is the main reason for the formation of the ozone hole over Antarctica?

  • Higher ozone levels in the stratosphere
  • Increased presence of nacreous clouds
  • Thicker ozone layer over Earth
  • Changes in the Antarctic polar vortex (correct)

    • Which gas is NOT considered a major ozone-depleting substance?

  • CFCs
  • Chlorine
  • Bromine
  • Nitrogen (correct)

    • What is the average thickness of the ozone layer over Earth in Dobson Units?

  • 200 Dobson Units
  • 300 Dobson Units (correct)
  • 350 Dobson Units
  • 250 Dobson Units

    • What are Polar Stratospheric Clouds (PSCs) known as?

    <p>Nacreous clouds</p> Signup and view all the answers

    Which organization stated that the ozone layer is on track to recover within 4 decades?

    <p>United Nations Environment Programme</p> Signup and view all the answers

    What process results in the destruction of ozone in the stratosphere?

    <p>Catalytic cycles</p> Signup and view all the answers

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