Across
- 4. Dirty or harmful substances in the air, water, or land.
- 6. The natural home of an animal or plant.
- 7. To use materials again instead of throwing them away.
Down
- 1. The cutting down of many trees in forests.
- 2. A long period with little or no rain.
- 3. To protect resources and use them carefully.
- 5. Used to describe animals or plants that are at risk of disappearing.