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. Related Concepts: • 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.