[ad_1] The ozone layer protects the surface of the Earth from harmful ultraviolet rays. This year, the average hole size in the Earth's protective layer is 9.3 million square kilometers, which is …
Read More »[ad_1] The ozone layer protects the surface of the Earth from harmful ultraviolet rays. This year, the average hole size in the Earth's protective layer is 9.3 million square kilometers, which is …
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