Q1. The ozone hole was first discovered over ___.
- (a) Arctic
- (b) Antarctica
- (c) Indian Ocean
- (d) Pacific Ocean
Answer & solution
Answer: (b) Antarctica
The ozone hole was first discovered over Antarctica in 1985 by British scientists Joe Farman, Brian Gardiner, and Jonathan Shanklin of the British Antarctic Survey. They observed a dramatic seasonal thinning of the stratospheric ozone layer over the South Pole each spring (September–November). The discovery shocked the scientific community and led to the Montreal Protocol (1987), the international treaty to phase out ozone-depleting substances like CFCs.
Option (a) Arctic — Incorrect: While ozone depletion also occurs over the Arctic, the ozone hole was first discovered over Antarctica, not the Arctic.
Option (c) Indian Ocean — Incorrect: The ozone hole phenomenon is specifically associated with the polar regions (Antarctica), not the Indian Ocean.
Option (d) Pacific Ocean — Incorrect: The Pacific Ocean is not associated with ozone hole discovery; the ozone hole is a polar phenomenon first found over Antarctica.