Across
- 1. Large bodies of salt water; another biological system.
- 4. Major cause of environmental stress; increasing rapidly.
- 6. One of the most threatened biological systems.
- 8. Colour symbolising environmental protection.
- 10. Using resources responsibly without harming the future.
Down
- 2. Related to the movement that began in 1972.
- 3. One of the most overused resources; home to biodiversity.
- 5. What the “ailing planet” ultimately supports.
- 7. The living support mechanisms of the Earth.
- 9. One of the four exhaustible biological systems.