Across
- 3. building cities or roads
- 4. cutting down trees for wood, farms, and cities
- 7. when air, water, or land gets dirty and harmful
- 8. animals that can become endangered
- 12. reduces fish population
- 14. prevent forest _____
- 15. no animals left
- 17. when Earth's temperature increases
- 19. where an animal lives
- 20. may disappear soon
Down
- 1. when a natural home for plants and animals is damaged or destroyed
- 2. avoid single use _____
- 5. fires burn trees and plants
- 6. plants or animals that don't belong in an area and cause problems for native species
- 9. stop cutting too many _____
- 10. too much water can kill plants
- 11. place with a lot of trees and rain
- 13. use _____ bottles, bags, and straws
- 16. lack of rain can dry out grasslands
- 18. _____ paper products