Across
- 3. things we throw away; garbage.
- 5. a big area of water surrounded by land.
- 7. a clear material used for windows and bottles.
- 11. to keep something safe.
- 12. problems. big problems that affect the whole world.
- 13. a hard, strong material used for cars or cans.
- 14. land with farms, trees, and nature; not the city.
- 19. to make the air, water, or land dirty.
- 20. when the ground shakes.
- 21. a big fire that burns forests or fields.
- 23. how hot or cold something is.
- 24. dirty air that looks like smoke in the city.
Down
- 1. garbage that people throw on the ground.
- 2. dirty air, water, or land.
- 4. things we throw away; waste.
- 6. a building where things are made.
- 8. to chop or remove trees.
- 9. the world around us — air, water, plants, and animals.
- 10. salt water that covers most of the Earth.
- 11. a material used to make bottles, bags, and many things.
- 15. to use less or stop something from being lost.
- 16. to make something dirty or unsafe.
- 17. trash; things we don’t need.
- 18. to break or ruin something completely.
- 19. to put trees in the ground so they can grow.
- 22. a big area with many trees.