Water Pollution

7. Chemicals used to keep insects away from crops, but causes harm to downstream ecosystems
8. A metal that was used to construct water pipes and is toxic to humans
13. Human trash and waste that disrupts life in lakes, rivers, oceans, streams, and groundwater
14. An area of ground above a septic tank used for breaking down contaminants in waste water
15. A group of industrial compounds that can cause cancer and persist in the environment for years
16. An excess of nutrients that creates a spike in bacterial populations in a body of water
17. Artificial ponds used to put livestock wastewater in

1. The company that was responsible for the 1989 oil spill in Alaska
2. Passed in 1972, allowing for the protection and restoration of aquatic ecosystems
3. The pharmaceutical chemicals that are most frequently detected in bodies of water and that can alter the tissues of aquatic organisms
4. The process of corrosive substances landing on plants and seeping into soil as during rain or snowfall
5. Water that can pollute bodies of water due to improper treatment
6. An area in a body of water that has low amounts of dissolved oxygen and is inhospitable to aquatic life
9. An insecticide that can travel up the food web and concentrate in large birds, leading to thinner egg shells and decreased birth rates
10. A specific location that adds pollution to an area
11. Heavy metal that is naturally occuring, but is added to the environment through the burning of coal
12. The amount of dissolved oxygen that the organisms in a body of water require