I've heard of ground-level ozone but can you explain what it is exactly?
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.
Sorry? What does VOC stand for?
Oh, Vous are'volatile organic compounds'. That's a technical term for solvents or other chemicals found in things like paint.
So, what damage does ozone do to the environment?
Well, it can cause smog, which can affect people's health - especially people with breathing difficulties.