Across
- 4. Method of extracting oil or natural gas
- 5. Reduction in dissolved oxygen from a certain point
- 6. Most effective way of pollution control
- 12. lakes with low nutrient levels, clear waters
- 13. Method of cleaning rivers via waste consuming bacteria
- 15. Addition of nutrients to a water source
Down
- 1. Eutrophication due to human activities
- 2. Rapid increase in algae due to eutrophication
- 3. areas of water where aquatic life can't live due to low oxygen
- 7. Process of treating water, removing color, smell, and killing most bacterias
- 8. dumps a small city worth of pollution
- 9. Decreasing concentration by adding water
- 10. Water used at home or through industrial practices
- 11. Most significant oil spills in the world
- 14. lakes that have lost too much oxygen and aquatic life begins to die off