1. Environmental Issues

2. Pollution n The presence of a SUBSTANCE in water, air, or soil that makes them OFFENSIVE to humans.

3. WATER n Is one of our most precious RESOURCES

4. Water n Water that is suitable for DRINKING is referred to as POTABLE water

5. Sources of Pollution n Oil Products n Soil Erosion n Animal and Human Waste n Chemical fertilizers, pesticides, and herbicides n High temperature water discharge

6. Eutrophication n An increase in the amount of NUTRIENTS in an environment

7. Nutrients n Nutrients in water are expressed in terms of PARTS PER MILLIONS (PPM)

8. Nitrates n Nitrates are a common source of POLLUTION

9. Sources of Nitrates n Animal Waste n Human Waste n Chemical fertilizers n Dead and decaying organisms

10. Eutrophication n One of the first INDICATIONS of eutrophication in water is the presence of ALGAE

11. Eutrophication n Also known as POND SCUM

12. Waste Control n Sewage Treatment Plants n Septic Tanks n Waste Lagoons

13. Sewage Treatment Plants n Larger towns and cities n Treat waste water to remove B.O.D. n Use Oxygenation, Chlorine, & UV Light n Tremonton, Brigham City

14. Septic Tanks n Used in rural areas n Settling tank and Drain Field n Will not work if area is densely populated

15. Waste Lagoons n Used in dairies, feed lots, and some towns and cities n Logan and Perry n Animal waste is stored in a settling pond where it is decomposed by anaerobic bacteria

16. Water Pollution n Occurs in both groundwater and in surface water

17. Ground water n Water stored in underground lakes called aquifers

18. Surface Water n Water is absorbed by the soil as it flows into the aquifers

19. Non-Point Source Pollution n Pollution that originates from many sources

20. Point source pollution n Pollution that results from a single source

21. Erosion n Our largest environmental problem n Wasting away of soil by wind or water

22. Two main problems of erosion n The loss of Topsoil n The pollution of water by the erosion of soil

23. Soil Erosion Damage n Loss of topsoil n Pollution of rivers and streams n Kills fish and plants

24. Soil Conservation Service n An agency organized to help prevent the loss of topsoil and to stop erosion caused by the washing away of soil.

25. Examples of soil conservation practices n Windbreaks n Terracing n Crop rotation (summer fallow) n Contour plowing n No-till and minimum till planting

26. Wetlands n A piece of land that stays underwater for most of the year

27. Wetlands provide several roles n Habitat n Filtering of water n Water storage n Flood prevention

28. EPA Regulations n Restrict use n Incentives to preserve wetlands n Permit must be obtained before land can be disturbed