why O3 is a pollutant? 5 marks
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Ground-level Ozone Pollution. Ozone can be “good” or “bad” for health and the environment depending on where it's found in the atmosphere. Stratospheric ozone is “good” because it protects living things from ultraviolet radiation from the sun.
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Ozone is a gas that is formed when nitrogen oxides react with a group of air pollutants known as 'reactive organic substances' in the presence of sunlight. ... Motor vehicle exhaust fumes produce as much as 70% of the nitrogen oxides and 50% of the organic chemicals that form ozone.
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