Across
- 5. growing food
- 6. contamination of the environment
- 9. when water seeps into the ground
- 14. a resource that can't be replaced
- 16. protecting resources by limiting their use
- 19. a dangerous pollutant in coal
- 21. the city life
- 22. chemicals designed to kill insects
- 24. microscopic bits of solid oil pollution
- 27. what happens to urban areas in the sun
- 28. when water runs along the surface of the earth
- 29. chemicals designed to kill plants
- 30. a water source beneath your feet
Down
- 1. neither urban or rural
- 2. the social norms of a society
- 3. the land around a stream that gathers water
- 4. the Rachel Carson Reserve has them
- 7. a key ingredient in smog
- 8. a dangerous pollutant in coal
- 10. the business of making things
- 11. a dangerous pollutant in coal
- 12. landmark law protecting us from air pollution
- 13. pollution that enters the environment at a definite point
- 15. creatures that take over a new ecosystem
- 17. pollution that enters the environment from a larger area
- 18. the total amount of living material
- 20. people just want to have fun
- 23. energy source from ancient creatures
- 25. a period of not enough water
- 26. a resource that can be replaced quickly
- 28. living in the country