Across
- 6. The natural world, including air, water, land, and living things, especially as affected by human activity.
- 7. To convert waste materials into new, reusable materials or products.
- 9. Decayed organic matter used as fertilizer; the process of decomposing organic waste into nutrient-rich soil.
- 10. To transform
- 12. Relating to a method of using resources so they are not depleted or permanently damaged for future generations.
- 14. The branch of science studying the relationships between organisms and their environment.
- 16. A form of oxygen found in Earth's upper atmosphere that absorbs harmful ultraviolet radiation from the sun.
- 17. No longer existing; having died out entirely as a species.
- 18. Trash or waste left scattered in a public place or natural environment.
- 19. Capable of being naturally replenished; not permanently depleted by use.
Down
- 1. Of, relating to, or derived from living matter; produced without synthetic chemicals.
- 2. To keep safe from harm, decay, or destruction.
- 3. The layer of gases surrounding Earth, held in place by gravity.
- 4. A site where waste is buried in layers in the ground.
- 5. To make (air, water, or land) dirty and unsafe through harmful substances.
- 6. Pollutants or gases released into the atmosphere from various sources.
- 8. A community of living organisms interacting with each other and their physical environment.
- 11. To protect from loss, waste, or harm; to use carefully and sparingly.
- 13. Of or relating to the sun or energy derived from sunlight.
- 15. The natural environment where a plant or animal species lives and thrives.