Across
- 1. Decayed organic matter used as a plant fertilizer.
- 3. The variety of life in the world or in a particular habitat or ecosystem.
- 7. A biological community of interacting organisms and their physical environment.
- 8. The natural home or environment of an animal, plant, or other organism.
Down
- 2. The introduction of harmful materials into the environment.
- 4. The clearing or thinning of forests by humans.
- 5. Meeting the needs of the present without compromising future generations.
- 6. The process of planting trees in a vanished forest area.