Across
- 2. These three letters stand for the amount of oxygen a quantity of water uses over a period of time
- 4. is produced by livestock, human activities, and sewage, and has to do with water
- 8. when a body of water is full of nutrients
- 9. large container that receives waste water, commonly found in remote places under homes
- 12. a species that indicates whether or not disease pathogens are present
- 13. The contamination of streams, rivers, lakes, or oceans with litter or human substances
- 15. basically vitamins found in foods needed for everyday life of organisms
Down
- 1. acids deposited on earth as rain or snow or as gases and particles
- 3. the act in 1972 created for more clean water
- 5. ___Source which is a diffuse area that produces pollution
- 6. when fresh water meets the ocean in form of a stream or lake
- 7. small sewage treatment system made up of a septic tank
- 10. area or commonly lakes without life and little oxygen concentration
- 11. a component of a septic system, made of underground pipes
- 14. ___Source which is a distinct point where pollution is directly produced