The correct answer is (a) 16th September.
International Ozone Day is celebrated on September 16 each year to raise awareness about the importance of the ozone layer and the dangers of ozone depletion. The day was established by the United Nations General Assembly in 1994, on the 15th anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer.
The ozone layer is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth’s atmosphere as a whole is about 0.3 parts per million.
The ozone layer is important because it protects
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