Answer:
1. Cells
2. Chemicals
3. Air pollution
4. Polluted
5. Contaminated
6. Factories
7. Wastes
8. Air
9. Garbage
10. Respiratory
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Answers & Comments
Answer:
1. Cells
2. Chemicals
3. Air pollution
4. Polluted
5. Contaminated
6. Factories
7. Wastes
8. Air
9. Garbage
10. Respiratory