1. Water Pollution

2. Types of Water Pollution Effect of sewage on dissolved oxygen and biological oxygen demand

3. Types of Water Pollution Eutrophication: An Enrichment Problem Oligotrophic lake

4. Types of Water Pollution Eutrophication: An Enrichment Problem Eutrophic lake

5. Types of Water Pollution Sediment Pollution Low sediment load

6. Types of Water Pollution Sediment Pollution High sediment load

7. Types of Water Pollution Inorganic Plant and Algal Nutrients The Dead Zone in the Gulf of Mexico

8. Water Quality Today Municipal Water Pollution

9. Water Quality Today Groundwater Pollution

10. Improving Water Quality Purification of Drinking Water General process: Collected from reservoir or ground water.

11. Improving Water Quality Purification of Drinking Water General process: Water treated

12. Improving Water Quality Purification of Drinking Water General process: Distributed to customers Wastewater collected as sewage

13. Improving Water Quality Purification of Drinking Water General process: Sewage treated

14. Improving Water Quality Municipal Sewage Treatment Primary and Secondary Sewage Treatment

15. Improving Water Quality Individual Septic Systems Septic tank

16. Improving Water Quality Individual Septic Systems Drain field/Leach Fields

17. Laws Controlling Water Pollution Case-in-Point: Water Pollution in the Great Lakes

18. What is a Pesticide? First-Generation Pesticides Inorganic compounds (e.g., lead, mercury) Botanicals (e.g., nicotine, pyrethrin)

19. Benefits and Problems with Pesticides Benefit: Disease Control Location of malaria

20. Benefits and Problems with Pesticides Problem: Evolution of Genetic Resistance # of species exhibiting genetic resistance to pesticides

21. Benefits and Problems with Pesticides Problem: Evolution of Genetic Resistance Creates a pesticide treadmill Pesticide application Kills most pests Resistant survive Numbers increase New population genetically resistant EVEN MORE INCREASE

22. Benefits and Problems with Pesticides Problem: Imbalances in the Ecosystem Creation of New Pests

23. Benefits and Problems with Pesticides Problem: Persistence, Bioaccumulation, and Biological Magnification Biomagnification of DDT

24. Benefits and Problems with Pesticides Problem: Mobility in the Environment

25. Risks of Pesticides to Human Health Short-term Effects of Pesticides Handling of food with pesticide residue

26. Alternatives to Pesticides Integrated Pest Management

27. Alternatives to Pesticides Integrated Pest Management Rice Production in Indonesia IPM introduced

28. World Food Problems Common diseases due to malnourishment: Kwashiorkor kwa·shi·or·kor (kwä'shē-ôr'kôr') Severe protein malnutrition, especially in children after weaning, marked by lethargy, growth retardation, anemia, edema, potbelly, skin depigmentation, and hair loss or change in hair color.

29. Common diseases due to malnourishment: Ma·ras·mus (mə- răz'məs) A progressive wasting of the body, occurring chiefly in young children and associated with insufficient intake or malabsorption of food.

30. World Food Problems Maintaining Grain Stockpiles World grain carryover stocks U.N. estimates that carryover stocks should not fall below 70 days.

31. The Principal Types of Agriculture Industrialized agriculture

32. Challenges of Producing More Crops and Livestock Increasing Crop Yields US wheat yields

33. Challenges of Producing More Crops and Livestock Genetic Engineering

34. Solutions to Agricultural Problems Sustainable Agriculture

35. Fisheries of the World Overharvesting is the most serious problem

36. Hazardous and Solid Waste Types of Solid Waste

37. Solid Waste Disposal of Solid Waste- Too many landfills!

38. Sanitary Landfills

39. Solid Waste The Special Problem of Tires Made from materials that cannot be recycled Can be incinerated

40. Solid Waste Disposal of Solid Wastes Incineration CO 2 emissions per kwatt-hour of electricity production

41. Solid Waste Mass burn incinerator

42. Waste Prevention Recycling, Composting, Reusing Solid waste produced by average family of four in one year in US

43. Waste Prevention Integrated Waste Management

44. Hazardous Waste Case-in-Point: Hanford Nuclear Reservation Drums of low-level nuclear waste

45. Hazardous Waste Hazardous waste landfill