Finally, some good news from the environment.
The ozone layer – which protects us from the harmful sun radiation – heals slowly, the United Nations announced on Monday
"It's really good news," said NASA scientist Paul Newman, co-author of the U. N. report
In the northern half of the world, the mattress should be fully repaired by the 2030s, the report said. The good news is due to decades of global cooperation on the gradual elimination of ozone-depleting chemicals.
"If ozone-depleting substances have continued to grow, we would have had tremendous results." We stopped this, "Newman said. If nothing had been done to stop the thinning, the world would have destroyed two-thirds of the ozone layer by 2065, he said.
The unexpected hole of ozone above Antarctica is recovering, although it will continue to happen every year until the 2060s. (Ozone will take more time to cure in the southern half of the world.)
The ozone layer is in the stratosphere about 7 to 25 miles above Earth's surface, according to NASA. It works like a sunscreen, protecting the planet from ultraviolet radiation that can cause skin and cataract cancer, suppresses the immune system and damages the plants.
The naturally occurring ozone that is high in the atmosphere is "good" ozone and is in contrast to the "bad" ozone near the surface, which is the human infection that can cause respiratory problems.
Scientists first discovered the dramatic dilution of the Earth's ozone layer in the 1970s and determined the production of chlorofluorocarbons (CFCs), used in refrigerators and aerosol sprays.
In the late 1980s, 196 countries signed the Montreal Protocol, a treaty limiting CFC production around the world. Businesses soon came up with safer alternatives for spray cans and refrigerators.
Scientists say that how to deal with humankind from the ozone problem also provides a model of how we can neutralize human-induced global warming.
"The Montreal Protocol is one of the most successful multilateral agreements in history for a reason," said Erik Solheim, head of the United Nations Environment Program. "The careful combination of valid science and collective action that has set the protocol for more than 30 years to cure the ozone layer is precisely because the Kigali amendment has such a promise of climate action in the future," he said in a statement .
Kigali's amendment calls for the future use of strong gas for climate change known as HFCs in refrigerators, air conditioners and cars.
"Carbon dioxide emissions are by far the most important greenhouse gases that cause global warming," said Petteri Taalas, Secretary General of World Meteorology. "But we can also help tackle climate change by reducing our commitment to other gases, including HFCs. Every bit of heating is important," he said.
Contribution: The Associated Press
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