I've heard of ground-level ozone but can you explain what it is exactly ?
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user
Yes , it's one of the main air pollutants . Factories don't emit it directly into the air . It's actually formed when nitrogen oxides and VOC emissions come into contact with heat and sunlight .
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assistant
Sorry ? What does VOC stand for ?
neutral
user
Oh , Vous are ' volatile organic compounds ' . That's a technical term for solvents or other chemicals found in things like paint .
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assistant
So , what damage does ozone do to the environment ?
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user
Well , it can cause smog , which can affect people's health - especially people with breathing difficulties .
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assistant