Across
- 2. Planting trees again where they were cut
- 4. The gradual warming of the planet
- 5. Thin layer of air around the Earth
- 7. Waste that can break down naturally
- 8. Place where animals and plants live
- 9. The variety of different living things in an area
- 10. Source of power like sun or wind that never runs out
Down
- 1. Materials like bottles and paper that are processed to be used again
- 3. Careful use of resources so they last longer
- 6. Dirtying air, water or soil with harmful substances