Across
- 2. Gases or substances released into the atmosphere, especially pollutants
- 4. Gases in the atmosphere that trap heat
- 6. The presence of harmful substances in the environment
- 10. The protection and preservation of natural resources and wildlife
- 11. The gradual increase in Earth's average surface temperature
- 13. Animals or plants at serious risk of extinction
- 14. The clearing or cutting down of forests on a large scale
- 15. A community of living organisms interacting with their physical environment
Down
- 1. Energy sources formed from ancient organic matter, like coal and oil
- 3. Processing used materials to create new products
- 5. Energy from sources that naturally replenish, like solar or wind
- 7. The total amount of greenhouse gases produced by human activities
- 8. Meeting current needs without compromising future generations
- 9. Long-term shifts in temperatures and weather patterns
- 12. The variety of plant and animal life in a particular habitat