Across
- 2. used to fight unhealthy air
- 3. causes poor visibility
- 6. rain can kill plants and animals
- 8. fuel we burn this to get energy
- 10. station is a place that store energy
- 14. spills caused by collisions between ships
- 15. gas like things
- 18. nonsolid
- 20. problems by breathing in carbon monoxide
Down
- 1. a air substance and unhealthy to breathe in
- 4. a green substance
- 5. a thing that creates smoke by working
- 7. used to measure air quality
- 9. needed to supports life
- 11. things we need to breath
- 12. dioxide is a bad air substance
- 13. sewage is a toxic waste from industries
- 16. a hard or rock object
- 17. a thing we don't want
- 19. fires cause harm to natural