Across
- 3. Soil or dust that makes something unclean
- 7. When a type of animal or plant disappears completely
- 8. All living things and their environment in one area
- 9. Substance added to soil to help plants grow
- 11. Natural home of a plant, animal, or other organism
- 12. Related to living things
Down
- 1. Not harmful to the environment
- 2. Building made of glass used to grow plants
- 3. Sudden event like a flood or earthquake that causes damage
- 4. Natural materials like water, trees, or minerals
- 5. The act of making something dirty or impure
- 6. To save or use something carefully, especially resources
- 10. To release or send out (like gas or heat)