Across
- 3. a form of oxygen
- 4. turning waste into useable material
- 6. to use again
- 8. All the physical surroundings on Earth
- 11. the capacity for doing work
- 12. keeping and protecting from waste
Down
- 1. relationships between living things and their surroundings
- 2. a place that an animal lives
- 5. harmful materials into the environment
- 7. like the weather, but over a long time.
- 9. each of the twenty-four-hour periods
- 10. a color between blue and yellow