Across
- 5. treatment to make water cleaner
- 6. things that make us feel better
- 8. foods things humans eat
- 9. things fish eat
- 10. material of natural or synthetic origin
Down
- 1. face accessories
- 2. total quantity or weight of organisms
- 3. emissions seaweed absorbs these
- 4. large algae
- 7. material such as coal