Earth Day

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Across
  1. 6. Heat trapping gases contributing to climate warming (10)
  2. 7. Protective layer of gases surrounding Earth (10)
  3. 8. Gradual increase in Earth’s average temperature (13)
  4. 11. Fuel derived from fossilized organic matter (4)
  5. 12. Natural home of an organism (7)
Down
  1. 1. Variety of life within an ecosystem (12)
  2. 2. Farming method that maintains soil health and ecosystems (12)
  3. 3. Process of restoring forests after they’ve been removed (14)
  4. 4. Use of resources at a rate that does not deplete them (14)
  5. 5. Materials that do not easily decompose (9)
  6. 9. Conversion of waste into reusable materials (9)
  7. 10. Energy source derived from sunlight (5)