Question

Ozone hole was detected in which of the following years ?
1. 1958
2. 1972
3. 1985
4. 1995

Answer 1

Correct Answer - Option 3 : 1985

The correct answer is 1985.

• In the scientific journal Nature on May 16, 1985, three scientists from the British Antarctic detect abnormally low levels of ozone over the South Pole.
  • Their discovery is commonly known as the Ozone Hole.
• In the atmosphere, Chlorofluorocarbons (CFCs) drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which can destroy ozone molecules.
• CFCs are the main reason for the Ozone hole.
• The Negative Effects of the ozone hole are certain types of skin cancers, eye cataracts, and immune deficiency disorders.

• Ozone depletion is greatest near poles.
• The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation from the sun.
• The ozone layer exists in the stratosphere, a layer 10 to 50 km above the Earth’s surface.
• The international community established the Montreal Protocol on ozone-depleting substances in 1987, to address the destruction of the ozone layer.