Across
- 6. envelope of gases surrounding
- 8. variety of plant and animal life
- 9. extreme heat events
- 11. the needs of the present without compromising
- 13. Earth's water, in the ocean
- 15. distance of a place north or south
- 16. devoid of life
Down
- 1. below the Earth's surface
- 2. species that live in that location
- 3. ecosystem water-based
- 4. rocky outer part of Earth
- 5. living or once living components
- 7. relating to or occupying space
- 10. area where living organisms
- 12. ecosystem land-based community of organisms
- 14. great height
- 17. arrangement of the natural and artificial