Across
- 3. Triatom of oxygen that protects us from UV rays
- 4. Overgrowth of bacteria an algae in an aquatic environment
- 5. Tiny free floating organisms in aquatic system
- 8. Rock Formations under the ground that carry water
- 10. Removal of excess salt from water or soil
Down
- 1. Precipitation with excess nitric and sulphuric acid
- 2. Organism which hunts and eats other organisms
- 6. Process of establishing forest
- 7. Animals that mainly eat plants
- 9. An organism on or in which a parasitic lives