Across
- 3. the contamination of air, water, or land
- 6. poisonous and dangerous to health
- 8. easy to catch fire
- 10. to take air into the lungs
- 11. dangerous and not safe
Down
- 1. harmful gases produced by cars or factories
- 2. the natural world where people, animals, and plants live
- 4. loud or unpleasant sounds that disturb people
- 5. the state of being well and free from illness
- 6. waste or rubbish thrown away
- 7. dirty air mixed with smoke and fog
- 9. to let something go into the air or environment