Across
- 3. A material that can cause serious environmental problems.
- 5. long-term increase in Earth’s average temperature.
- 8. To make something smaller or use less of something.
- 9. Planting trees again in an area where forests were destroyed.
- 13. A community of organisms interacting with their environment.
- 15. Using resources without destroying them for future generations.
- 16. Organic material that can be used as natural fertilizer.
- 17. To keep something safe from harm.
Down
- 1. Able to be naturally replaced, such as solar or wind energy.
- 2. Harmful substances that make air, water, or land dirty.
- 4. The protection of nature and natural resources.
- 6. The variety of living things in an area.
- 7. Rubbish left carelessly in public places.
- 10. To process used materials so they can be used again.
- 11. The usual weather conditions of a place.
- 12. To use something again instead of throwing it away.
- 14. Unwanted materials that people throw away.