Today is World Ozone Day which is also known as the International Day for the preservation of the Ozone Layer. It is observed every year on September 16 to commemorate the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. The Montreal Protocol was signed in 1987.
What is Ozone layer?
The ozone layer, in the stratosphere, is where about 90% of the ozone in the Earth system is found. But ozone makes up only one to ten out of every million molecules in the ozone layer. There isn't much of it, but ozone is powerful, able to block the most harmful radiation.
Is the Ozone Layer recovering?
According to a study completed in 2018, ‘Scientific Assessment of Ozone Depletion’, some parts of the ozone layer has recovered at a rate of 1 to 3% per decade since 2000. This report suggested that by the end of 2030 Ozone layer may heal completely in Northern hemisphere. Similarly, the ozone layer in Southern hemisphere and Polar Regions will be recovered by 2050 and 2060 respectively.
Effect of the Montreal Protocol today
The Montreal Protocol has been dubbed the world’s most successful environmental agreement. The Treaty is slowly but surely reversing the damage caused to the ozone layer by industrial gases. As the gases have been phased out, the hole over Antarctica is slowly reducing and the concentration of the harmful gases have fallen by 14 percent since 2000. As per an assessment released in 2014, it will take the hole 30-40 years to shrink to the size it was in 1980
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