Where was the "hole in the sky" first discovered?

The "hole in the sky" refers to the discovery of the ozone hole, which was first observed over Antarctica, specifically at the South Pole. Scientists initially noted significant depletion of ozone during the spring months in the 1980s, which was attributed to human-made chemicals known as chlorofluorocarbons (CFCs). The unique atmospheric conditions present over Antarctica, particularly during the polar winter, led to the formation of the ozone hole, making this location a critical point for environmental health research and monitoring. This observation has played a significant role in understanding the impact of human activities on the ozone layer, prompting international efforts to reduce the use of ozone-depleting substances.