Across
- 2. to process at item such as water bottles in order to regain materials for human use
- 6. the act of preserving, guarding or protecting
- 7. founder of Earth Day
Down
- 1. activity coordinator for Earth day
- 3. first celebrated on April 22, 1970
- 4. the study of relationships of organisms to their environment
- 5. your world, surroundings, and source of life and health