Across
- 4. Harmful substances added to air, water, or land
- 7. Variety of plants and animals in nature
- 8. Turning waste into reusable materials
- 9. Energy we get from sunlight
- 11. Energy sources that never run out easily
- 12. Type of radiation from the sun that can harm skin
- 13. Energy that travels in waves and can come from the sun or machines
- 14. Living things and their environment working together
- 15. Gas released by vehicles that affects climate
Down
- 1. Animals living freely in nature
- 2. Cutting down too many trees
- 3. Place where garbage is buried
- 5. Effect that traps heat and warms the Earth
- 6. Natural fertilizer made from food waste
- 10. Layer that protects Earth from harmful radiation