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Which of the following are the possible impacts of ozone layer depletion?
1. Delay in plant formation and timing of development
2. Increase in tropospheric ozone
3. Relative cooling of the troposphere
4. Increased incidence of cataracts in humans
Select the correct answer using the code given below.
- a)1 and 2 only
- b)1, 3 and 4 only
- c)3 and 4 only
- d)1, 2, 3 and 4
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following are the possible impacts of ozone layer depleti...
Impact of Ozone Layer Depletion:
Delay in plant formation and timing of development:
- Ozone layer depletion can lead to an increase in harmful UV radiation reaching the Earth's surface.
- This can affect the growth and development of plants, as excessive UV radiation can inhibit photosynthesis and damage plant tissues.
- This may result in delayed plant formation and affect the timing of plant development.
Increase in tropospheric ozone:
- Ozone layer depletion can lead to the breakdown of ozone molecules in the stratosphere.
- This can result in the release of ozone-depleting substances into the atmosphere, leading to an increase in tropospheric ozone.
- High levels of tropospheric ozone can have harmful effects on human health, vegetation, and ecosystems.
Relative cooling of the troposphere:
- Ozone depletion can lead to changes in atmospheric circulation patterns, resulting in a cooling effect in the troposphere.
- This cooling effect can impact weather patterns, including the distribution of rainfall and temperature changes.
Increased incidence of cataracts in humans:
- Exposure to increased levels of UV radiation due to ozone layer depletion can have adverse effects on human health.
- One of the potential health impacts is an increased incidence of cataracts, which are characterized by clouding of the lens of the eye.
- Protecting the ozone layer is crucial to prevent such health issues.
In conclusion, ozone layer depletion can have multiple negative impacts on the environment, human health, and ecosystems. It is essential to take measures to protect the ozone layer and mitigate the effects of depletion.
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Which of the following are the possible impacts of ozone layer depleti...
- A higher-than-normal concentration of Ozone molecules called the Ozone layer, is found in Stratosphere. It acts as a shield absorbing ultraviolet radiation from the sun. Depletion of the Ozone layer or Ozone hole leads to more UV rays reaching the lower atmosphere.
- Since ozone prevents high-intensity ultraviolet radiation from reaching the surface of the Earth and causing stratospheric warming, it can be assumed that the formation of the ozone hole changes the total radiation budget of the Earth. This is, indeed, the case. However, ozone depletion and the formation of the polar ozone holes don’t lead to a further warming of the troposphere, but to a slight cooling.
- The absorption of ultraviolet radiation by ozone molecules causes warming in the stratosphere. Some of this heat emitted in the stratosphere is transferred to the troposphere causing slight tropospheric warming as well. This warming gets lessened due to the formation of an ozone hole.
- In the lower stratosphere, ozone can still act as a greenhouse gas and absorb infrared radiation coming from the Earth's surface. So absorption of both ultraviolet and infrared radiation by ozone leads to a warming of the upper troposphere. If ozone levels decrease, the upper troposphere will, therefore, get cooler.
- The high levels of UV rays cause non-melanoma skin cancer. Additionally, it plays a major role in malignant melanoma development. UV is also linked to cataracts.
- Plant growth as well as its physiological and developmental process are all affected negatively. These include the way plants form, the timing of development and growth, the distribution of plant nutrients and metabolism, etc. These changes can have important implications for plant competitive balance, animals feeding on these plants, plant diseases, and biogeochemical cycles.
- Increased surface UV leads to increased tropospheric ozone. Ground-level ozone is generally recognized to be a health risk, as ozone is toxic due to its strong oxidant properties. The risks are particularly high for young children, the elderly, and those with asthma or other respiratory difficulties. Ozone at ground level is produced mainly by the action of UV radiation on combustion gases from vehicle exhausts.
- Hence, option (d) is the correct answer
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Which of the following are the possible impacts of ozone layer depletion?1. Delay in plant formation and timing of development2. Increase in tropospheric ozone3. Relative cooling of the troposphere4. Increased incidence of cataracts in humansSelect the correct answer using the code given below.a)1 and 2 onlyb)1, 3 and 4 onlyc)3 and 4 onlyd)1, 2, 3 and 4Correct answer is option 'D'. Can you explain this answer?
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