Match the following:
1. the continuous movement of water between the earth's surface and the atmosphere petroleum
2. pollutes water sources by dumping wastes in rivers, streams, and oceans stimulants
3. the leading cause of water contamination in countries without water treatment plants pesticides
4. a source of water pollution caused by the overuse of pesticides and fertilizers humoral immunity
5. caused by an overabundance of organic matter in water supplies depressants
6. the decomposition of organic matter by microorganisms industry
7. a chemical pollutant that can enter the water cycle through agricultural or domestic use agriculture
8. can cause the contamination of underground water supplies if poured on the ground sewage
9. a metal that leaks into water supplies via the soil or aging water systems hydrological cycle
10. depends upon the production of disease-specific antibodies to destroy harmful bacteria putrefaction
11. increases the activity of the central nervous system bacterial infection
12. reduces the activity of the central nervous system eutrophication
13. caused by the reproduction of a small infectious agent, which produces poisons that destroy cells lead