Water pollution

4. the main cause of oil pollution in the oceans
6. the fairly clear middle water layer
7. anthropogenic inputs of nutrients leads to high levels of nutrients
9. phenomenon that kills organisms by drastically changing the water temperature
10. their manufacture in the U.S ended in 1979 but still are present in the environment and can cause
11. technique used on cargo ships and was designed to prevent future oil spills in the ocean
16. pollution that occurs in a diffuse area
17. control organisms that pose a threat to crop production and human health
21. best indicator species that are harmless and live inside human and other animal intestines
22. rural areas often use this relatively small and simple sewage treatment system

1. particles that attach to plant, soil, or water surfaces through rain, snow, or as gas
2. heavy metal that contaminates water through pipes
3. contaminates the soil where military rockets are tested
5. a large container that is connected to a house and receives its wastewater
8. a combination of pipes and lawns as part of the septic system Manurelagoon gross, human-made pools filled with manure from livestock
9. non chemical water pollution that occurs when human activities greatly change the water temperature
11. areas that are very depleted of oxygen,resulting in little surviving organisms
12. pollution that occurs in a distinct location
13. resulting from livestock operations and human activities, this is a major type of water pollution
14. anything that sinks to the bottom of septic tanks and forms solid waste
15. human activities and other sources lead to the contamination of streams, rivers, lakes, oceans, and groundwater
18. phenomenon resulting in high levels of nitrogen and phosphorus, which adds an abundance of fertility to the soil
19. less of this value indicates less pollution in a water body and a higher value indicates more pollution
20. scientists use organisms to tell if disease-carrying pathogens are present