ozone is formed is formed when the uv rays from the sun split into one oxygen molecule into two oxygen molecule atoms.the atomic oxygen then combines with another oxygen molecule to form ozone(o3) . most  of the ozone found in the earth's atmosphere occurs in one layer in the stratosphere. today the ozone layer helps to produce the observed verticle structure of the atmosphere and absorbs harmful uv rays that would other wise damage the plant and animal  life and causing skin cancerhope it helps u if yes then make my answer best and and click on thanku button
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