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Which layer of the atmosphere contains the ozone layer?
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
Answer: Stratosphere
The ozone layer is located in the stratosphere, approximately 15-35 km above Earth's surface. It absorbs 97-99% of the Sun's harmful ultraviolet (UV-B) radiation. Ozone depletion due to CFCs is a major environmental concern addressed by the Montreal Protocol (1987).