Across
- 3. Dirty stuff in the air or water.
- 5. To break or ruin something.
- 7. Rocks and dirt sliding down a hill.
- 8. Everything around us.
- 9. Cutting down too many trees.
- 10. Something very bad happening.
Down
- 1. When the ground shakes hard.
- 2. Earth getting hotter from human activities.
- 4. Big waves caused by an earthquake.
- 6. Using things again instead of throwing them away.
- 9. A long time without rain.