The formation of ozone hole in the Antarctic region has been a cause, of concern. What could be the reason for the formation of this hole?

[UPSC Civil Services Exam – 2011 Prelims]

(a) Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons

(b) Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons

(c) Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons.

(d) Increased temperature at polar region due to global warming


Answer: (b)        

Explanation:

  • Winds are responsible for constantly circulating the Earth’s atmosphere worldwide, causing ozone-depleting gases to spread everywhere, including Antarctica, regardless of their origin.
  • However, unique meteorological conditions in Antarctica result in these gases having a more potent impact on ozone depletion there than in any other location.
  • While humans have mainly released chlorofluorocarbons (CFCs) and halons (gases containing bromine) in the Northern Hemisphere, roughly 90% of these emissions have occurred in regions corresponding to North America, Japan, Europe, and Russia.

Consider the following statements:                                                                   The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

Read More »

Consider the following statements:                                                         The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India. The validity of a law placed in the Ninth Schedule cannot be examined by any court and no judgement can be made on it. Which of the statements given above is/are correct?

Consider the following statements:                                               

Read More »

Useful Links

Download
Neyyar App

Left Menu Icon