Question

How do we know that natural sources are not responsible for ozone depletion?

Answer 1

Natural causes of ozone depletion is radiations coming from the sun .Yes i know UV radiations are the main source of ozone formation, these high energy short wavelength radiations photolyze the oxygen molecule O2 and form two highly reactive oxygen atoms. These atom then combine to the O2 and form O3,but it is not bounded that the O atom just recombine to form Ozone , sometime O atom react with NOx that are naturally emitted from lights and fires to form nitric acid , that is very harmful. Some kind of bacteria also relaese NOx into the atmosphere.

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