Across
- 2. using less energy
- 5. Human cutting down forests
- 6. energy that will eventually run out
- 8. Burning of fossil fuels adds this to air
- 12. energy from the sun
- 14. energy that will never run out
- 15. Water rising in oceans
- 17. gas needed to breath
- 18. Reflection of sunlight
- 20. burning gas and oil releases
Down
- 1. Layer of gases surrounding Earth
- 3. burning of coal oil and natural gases
- 4. Planting trees again
- 7. increases in weather patterns
- 9. layer protecting the earth
- 10. Gas that traps heat in the atmosphere
- 11. Large body of moving ice
- 13. Weather getting hotter or colder
- 16. increases in average temperature
- 19. process that warms Earth