If you want, you can. The ozone layer that surrounds and protects the Earth recovers thanks to agreements to reduce the emission of aerosols that had caused the famous hole in the stratosphere, according to the latest scientific review carried out by the UN. This gap was the first global knock on the harmful effects of human activity in the atmosphere.
The scientific evidence gathered for the report of the Montreal Protocol indicates that in some parts of the stratosphere, the layer has grown at a rate of 2-3% per decade since 2000. At this rate, the study published continues every four years, the hole will be closed in the northern hemisphere in 2030. in the south by 2050 and in the polar caps in 2060. stratospheric ozone shields the planet from the harmful action of ultraviolet radiation from the sun. It is an essential shield for life.
Signed in 1987 and in force since 1989, the Montreal Protocol set in motion a battery of measures to reduce the emission of gases that eliminated ozone and thus achieve the recovery of the protective gas layer. It was the response to the evidence that human action had wreaked havoc on the atmosphere. "It is one of the most successful multilateral agreements in history," said the director of the UN environmental program on Monday. Erik Solheim. Sondheim attributes this success to the mix of "science and collaborative action".
More climate action
These results come when the International Panel of Experts on Climate Change has warned that they are necessary extraordinary measures at the international level (at an "unprecedented" level, they explained) to alleviate the worst effects of global warming.
In fact, a clause added to this protocol that seems to be saving the ozone layer is intended to help more in the fight against climate change than the faltering international steps after the signing of the Paris Agreement (specific to tackle the climate disaster). Next January, the Kigali amendment, designed to drastically reduce the use of hydrofluorocarbon gases, designed many times to replace the products that the Montreal Protocol delimited, comes into force.
These gases have a "great power to overheat the climate", explains the UN. And they are used in refrigerators and air conditioners. The amendment has been signed by 58 states that must cut the use of these gases by 80%. "The emsiones of CO2 are the main focus of greenhouse gases, but we can tackle climate change, also, expanding the cuts to other gases, any small warming counts", has summarized the director of the World Meteorological Agency Petteri Taalas