Across
- 7. A long period without rain.
- 9. A storm with lots of snow and wind.
- 10. A large amount of snow falling down a mountain.
- 11. Energy sources that do not run out, like wind or solar power.
- 14. Harmful substances in the environment.
- 17. A large ocean wave caused by an underwater earthquake.
- 18. The loud sound that follows lightning.
- 20. A very strong wind.
- 21. To use something carelessly and unnecessarily.
- 22. To use less of something, like water or energy.
Down
- 1. To keep something safe.
- 2. The usual weather conditions in an area.
- 3. To put trees or plants in the ground.
- 4. A mountain that erupts with lava and ash.
- 5. A large area covered with trees.
- 6. Related to the whole world.
- 7. To damage something so badly it cannot be fixed.
- 8. A powerful storm with strong winds and heavy rain.
- 12. When water covers land that is usually dry.
- 13. To turn off lights or appliances to save energy.
- 14. To collect garbage or litter from the ground.
- 15. A bright flash of electricity in the sky during a storm.
- 16. A rotating column of air that touches the ground.
- 19. A long period of extremely hot weather.