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Ozone Layer Video Lecture | Biology for SSS 1

FAQs on Ozone Layer Video Lecture - Biology for SSS 1

1. What is the ozone layer and why is it important?

Ans.The ozone layer is a region of Earth's stratosphere that contains a high concentration of ozone (O3) molecules. It is crucial because it absorbs the majority of the Sun's harmful ultraviolet (UV) radiation, protecting living organisms, including humans, from skin cancer, cataracts, and other health issues, as well as preserving ecosystems.

2. How has human activity impacted the ozone layer?

Ans.Human activities, particularly the release of chlorofluorocarbons (CFCs) and other ozone-depleting substances (ODS), have led to significant thinning of the ozone layer. These chemicals, once commonly used in aerosols, refrigeration, and air conditioning, break down ozone molecules when they rise into the stratosphere, causing depletion.

3. What are the effects of ozone layer depletion on the environment?

Ans.Ozone layer depletion increases the amount of UV radiation reaching Earth's surface, which can harm plant life, reduce crop yields, disrupt marine ecosystems, and negatively impact wildlife. It can also contribute to climate change by affecting the balance of ecosystems and altering weather patterns.

4. What measures have been taken to protect the ozone layer?

Ans.The most significant international effort to protect the ozone layer is the Montreal Protocol, which was adopted in 1987. This treaty aimed to phase out the production and consumption of ozone-depleting substances. Thanks to these efforts, there are signs of recovery in the ozone layer, with projections indicating it could return to its pre-1980 levels by mid-century.

5. Can the ozone layer recover, and if so, how long will it take?

Ans.Yes, the ozone layer can recover due to the global efforts to reduce the use of ozone-depleting substances. Current estimates suggest that the ozone layer could return to its pre-1980 levels by around 2050 to 2070, depending on the continued adherence to international agreements like the Montreal Protocol.

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Sep 25, 2025 Last updated

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	Biology for SSS 1 25 videos\|102 docs\|22 tests

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25 videos|102 docs|22 tests

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