Across
- 3. The process of making something suitable for a new use.
- 5. The variety of different types of life found on Earth.
- 6. The warming of Earth's atmosphere due to trapped heat.
- 8. A species at risk of extinction.
- 9. A gas produced by burning carbon and organic compounds.
- 12. The contamination of air, water, or soil by harmful substances.
- 13. The act of using resources wisely to avoid waste.
- 14. Energy sources that are replenished naturally, like wind or solar.
- 15. The cutting down of trees in large areas.
Down
- 1. The gradual increase in Earth's average temperature.
- 2. A place where a plant or animal naturally lives.
- 4. The natural world, including land, air, water, plants, and animals.
- 7. The process of converting waste into reusable material.
- 10. A natural fuel formed from the remains of living organisms.
- 11. The practice of protecting and preserving natural resources.