Ozone Depletion Cause
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Question (English)
The problem of ozone depletion is caused by high levels of:
- Carbon dioxide and methane
- Chlorine and bromine compounds in the stratosphere ✓ Correct
- Nitrogen and oxygen
- Water vapour and dust
Explanation:
Correct Answer Explanation
Ozone depletion is caused by high levels of chlorine and bromine compounds in the stratosphere.
Key Points:
- Origins: CFCs (used in air-conditioners, refrigerators, aerosol propellants) and halons (fire extinguishers).
- More ultraviolet (UV) radiation reaches Earth causing damage to living organisms.
- UV radiation causes skin cancer in humans and lowers phytoplankton production.
- About 5% reduction in ozone layer was detected from 1979 to 1990.
Why Other Options Are Wrong
- A: These contribute to global warming, not ozone depletion.
- C, D: These do not cause ozone depletion.
📚 About this Topic — CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT
This multiple choice question is from CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT, Indian Economic Development, NCERT Books. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT to strengthen your preparation.
