Water Pollution

2. pollutant that is caused when human and livestock waste is released into water without passing through treatment plants (9,6)
4. process that causes oxygen use up and eventually the death of aquatic organisms that require dissolved oxygen in water
6. pollutant that when sprayed from aircraft can drift onto areas of natural vegetation and kill plants
8. if it ditirorates it can form toxic compounds
9. pollutant that is caused by sulfur dioxide and nitrogen oxides (4,4)
10. can cause a condition called intersex that affects amphibians(6,13,8)
11. pollutant that can enter the body when absorbed through the skin (7,4,1,3)
12. it is used to remove the sulfur from power station chimneys by treating the waste gases with powdered limestone, neutralising the acidic gases before they can escape (4,3,16)
13. when sulfur dioxide and nitrogen oxides dissolve in water and react with the oxygen they produce sulfuric and nitric acids which lower the....
15. pollutant that usually causes a lot of visual pollution (9,7)

1. pollutant that is caused by rainwater runoff or leaching
3. they take a long time to decay (3,1,13,8)
5. pollutant which is used to prevent insect pests
7. pollutant that's source can be factories that release untreated chemicals directly into the water (8,5)
14. builds up in the food chain, for example, in predators it can reach levels that would damage a developing fetus, causing brain damage and other birth defects