This Montreal Protocol "came into being over 30 years ago in response to the revelation that chlorofluorocarbons (CFCs) and other ozone-depleting substances - used in aerosols, cooling and refrigeration systems, and many other items - were tearing a hole in the ozone layer and allowing risky ultraviolet radiation to flood through".
The delicate, gaseous barrier surrounds earth and protects life from harmful UV rays. In fact, the fight over the ozone layer in the mid-to-late 1980s somewhat mirrors the current debates surrounding global warming. Besides dichloromethane, another highly concentrated chemical identified in the stratosphere includes 1,2-dichloroethane - an ozone-depleting substance used to make PVC, a popular construction material.
The UN estimates that Northern Hemisphere and mid-latitude ozone should heal completely by the mid-2030s, followed by the Southern Hemisphere in the 2050s and the polar regions by 2060.
"If ozone-depleting substances had continued to increase, we would have seen huge effects". In 1987, countries around the world agreed in the Montreal Protocol to phase out CFCs and businesses came up with replacements for spray cans and other uses.
The emission of pollution containing chemicals such as chlorine and bromine has caused the ozone layer to deplete.
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At its worst in the late 1990s, about 10 percent of the upper ozone layer was depleted, said Newman. This year, the ozone hole over the South Pole peaked at about 9.6 million square miles. Newman added that if we hadn't made these changes, two-thirds of the ozone layer would have been destroyed by 2065.
Updated projections by climate change experts said the Antarctic ozone hole is expected to close, with column ozone values returning to 80s levels by about 2060. According to the United Nations, the ozone layer is recovering at a rate of 1-3 percent per decade, and may heal completely by 2060.
A new technology picked up an increase in emissions of banned CFCs out of East Asia, according to the report.
The writers of the report found that, if the Kigali Amendment is fully implemented, the world can avoid up to 0.4 percent of global warming this century, meaning that it will play a major role in keeping the global temperature rise below 2°C.
Pablo Campana, minister of Production, Foreign Trade and Investment, stated at the opening ceremony that 'being the venue of the Meeting of the Parties shows our country's compliance with the Montreal Protocol, and this is an ideal formu to spread the commitment by the national government to the industrial and sustainable development.