Across
- 4. The action or process of converting waste into reusable material.
- 5. Conserving an ecological balance by avoiding depletion of natural resources.
- 8. The action or state of making or being made impure by polluting or poisoning.
- 9. The variety of life found in a place on Earth
- 10. The process of growing plants in sand, gravel, or liquid, with added nutrients but without soil.
Down
- 1. The action of clearing a wide area of trees.
- 2. Prevention of wasteful use of a resource.
- 3. A biological community of interacting organisms and their physical environment.
- 6. Produced or involving production without the use of chemical fertilizers, pesticides, or other artificial chemicals.
- 7. The natural world, as a whole or in a particular geographical area, especially as affected by human activity.