Across
- 4. The upper layer of earth where plants grow.
- 6. The act of protecting and preserving natural resources and the environment.
- 8. The ability to do work; often derived from renewable or nonrenewable resources.
- 9. A transparent, odorless liquid that is essential for life.
- 12. Avoidance of the depletion of natural resources to maintain ecological balance.
- 13. The introduction of harmful substances into the environment.
- 14. An element found in all living things, central to the greenhouse effect.
- 15. The natural home or environment of an animal, plant, or other organism.
Down
- 1. A biological community of interacting organisms and their environment.
- 2. The process by which green plants make their food using sunlight.
- 3. The process of converting waste into reusable material.
- 5. The clearing of trees, transforming a forest into cleared land.
- 7. The weather conditions prevailing in an area over a long period.
- 10. Animals that live and grow in natural conditions.
- 11. The variety of life in the world or in a particular habitat.