Across
- 4. (adj) Occurring once every year, like environmental conferences
- 7. (v) To put wildlife or habitats at risk of harm
- 8. (n) Ancient carbon-based energy source like coal or oil
- 9. (n) Atmospheric substance that traps heat around Earth
- 11. (n) Worldwide increase in Earth's average temperature
- 13. (n) Commercial activity of cutting down trees
- 16. (n) Network of living things interacting in their environment
- 17. (n) Negative results of environmental damage
- 18. (n) Complete damage or elimination of natural environments
- 19. (n) Typical weather conditions in a region over a long period
- 20. (v) To forecast future environmental changes
- 21. (n) The source or origin of an environmental problem
Down
- 1. (n) Gaseous layer that surrounds and protects Earth
- 2. (n) Geographic region or zone of environmental interest
- 3. (phr v) To help make an environmental situation worse
- 4. (v) When plants take in carbon dioxide from the air
- 5. (n) Agricultural activity that produces food
- 6. (n) Difficult environmental task requiring special effort to solve
- 10. (n) Tropical woodland with high annual rainfall
- 12. (n) Environmental impact or result of human activities
- 14. (n) General direction of environmental change over time
- 15. (n) Important environmental problem needing attention
- 17. (n) Development activity that often replaces natural habitats