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Ozone layer hole will ‘totally heal within 50 years’
Key Excerpts from Article on Website of CNN News


CNN News, November 6, 2018
Posted: February 21st, 2021
https://www.cnn.com/2018/11/06/health/ozone-healing-scli-int...

The hole in the Earth’s ozone layer is expected to fully heal within 50 years, climate change experts predict in a new UN report. A fragile shield of gas around the planet, the ozone layer protects animal and plant life from the powerful ultraviolet (UV) rays of the sun. When the ozone layer is weakened, more UV rays can get through, making humans more prone to skin cancer, cataracts and other diseases. Scientists discovered huge damage to the layer in the 1980s and identified chlorofluorocarbons, or CFCs, as the main culprit. CFCs used to be common in refrigerators, aerosol cans and dry-cleaning chemicals, but they were banned globally under the Montreal Protocol of 1987. The decline in CFCs in our atmosphere as a result of those measures now mean the ozone layer is expected to have fully recovered sometime in the 2060s, according to the report by the UN Environment Programme, World Meteorological Organization, European Commission and other bodies. In parts of the stratosphere, where most of the ozone is found, the layer has recovered at a rate of 1-3% per decade since 2000, the authors state. At the recovery rates projected by the UN report, the northern hemisphere and mid-latitude ozone is scheduled to heal completely by the 2030s, followed by the southern hemisphere in the 2050s and polar regions by 2060. Erik Solheim, head of UN Environment, described the Montreal Protocol as “one of the most successful multilateral agreements in history.”

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