RECYCLING

4. decayed organic material that is used as a fertilizer for plants.
5. substances that are neither solid nor liquid, and can expand to fill any space.
7. the surroundings or conditions in which a person, animal, or plant lives or operates.
9. able to be maintained at a certain rate or level without depleting resources or causing harm.
11. person who advocates for the protection and preservation of natural resources and the environment.

1. the act of protecting and preserving natural resources and the environment.
2. the presence or introduction of harmful substances into the environment.
3. able to be replenished or replaced naturally and quickly.
6. able to be used again or multiple times.
8. the process of collecting and reusing materials that would otherwise be thrown away as waste.
10. large areas where garbage is buried under the ground.
12. materials or things that can be used to meet a need or accomplish a purpose.