World Ozone Day is observed annually 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. 

World Ozone Day 16th september 2019 Theme- '32 Years and Healing'-

The day aims to increase awareness of climate change and ozone depletion. It serves as a reminder that humans must keep up their momentum to ensure healthy people and a healthy planet.

The ozone layer is a fragile shield of gas that protects the Earth and its ecosystem from the harmful ultraviolet rays of the sun, thus help preserve life on the planet

According to study which was 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. Also the ozone layer in Southern hemisphere and Polar Regions will be recovered by 2050 and 2060 respectively.
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