1. When too much dirt and chemicals get into the air, the air is dirty or polluted.
2. Asthma is a disease that makes it hard to breathe.
3. Adults are more sensitive to air pollution than children.
4. Air pollution is a problem only in big cities.
5. Burning leaves or trash at home contributes to air pollution.
6. The season when most smog forms is the summer.
7. All smokestack emissions pollute the air.
8. Air pollution now is under control and will not be a problem in the future.
9. Greenhouse gases make the Earth warmer by trapping energy in the atmosphere.
10. Ozone is bad when it is high up in the atmosphere.
Score = Correct answers:
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