Water Pollution
Types of Water Pollution Effect of sewage on dissolved oxygen and biological oxygen demand
Types of Water Pollution Eutrophication: An Enrichment Problem Oligotrophic lake
Types of Water Pollution Eutrophication: An Enrichment Problem Eutrophic lake
Types of Water Pollution Sediment Pollution Low sediment load
Types of Water Pollution Sediment Pollution High sediment load
Types of Water Pollution Inorganic Plant and Algal Nutrients The Dead Zone in the Gulf of Mexico
Water Quality Today Municipal Water Pollution
Water Quality Today Groundwater Pollution
Improving Water Quality Purification of Drinking Water General process: Collected from reservoir or ground water.
Improving Water Quality Purification of Drinking Water General process: Water treated
Improving Water Quality Purification of Drinking Water General process: Distributed to customers Wastewater collected as sewage
Improving Water Quality Purification of Drinking Water General process: Sewage treated
Improving Water Quality Municipal Sewage Treatment Primary and Secondary Sewage Treatment
Improving Water Quality Individual Septic Systems Septic tank
Improving Water Quality Individual Septic Systems Drain field/Leach Fields
Laws Controlling Water Pollution Case-in-Point: Water Pollution in the Great Lakes
What is a Pesticide? First-Generation Pesticides Inorganic compounds (e.g., lead, mercury) Botanicals (e.g., nicotine, pyrethrin)
Benefits and Problems with Pesticides Benefit: Disease Control Location of malaria
Benefits and Problems with Pesticides Problem: Evolution of Genetic Resistance # of species exhibiting genetic resistance to pesticides
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
Benefits and Problems with Pesticides Problem: Imbalances in the Ecosystem Creation of New Pests
Benefits and Problems with Pesticides Problem: Persistence, Bioaccumulation, and Biological Magnification Biomagnification of DDT
Benefits and Problems with Pesticides Problem: Mobility in the Environment
Risks of Pesticides to Human Health Short-term Effects of Pesticides Handling of food with pesticide residue
Alternatives to Pesticides Integrated Pest Management
Alternatives to Pesticides Integrated Pest Management Rice Production in Indonesia IPM introduced
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.
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.
World Food Problems Maintaining Grain Stockpiles World grain carryover stocks U.N. estimates that carryover stocks should not fall below 70 days.
The Principal Types of Agriculture Industrialized agriculture
Challenges of Producing More Crops and Livestock Increasing Crop Yields US wheat yields
Challenges of Producing More Crops and Livestock Genetic Engineering
Solutions to Agricultural Problems Sustainable Agriculture
Fisheries of the World Overharvesting is the most serious problem
Hazardous and Solid Waste Types of Solid Waste
Solid Waste Disposal of Solid Waste- Too many landfills!
Sanitary Landfills
Solid Waste The Special Problem of Tires Made from materials that cannot be recycled Can be incinerated
Solid Waste Disposal of Solid Wastes Incineration CO 2 emissions per kwatt-hour of electricity production
Solid Waste Mass burn incinerator
Waste Prevention Recycling, Composting, Reusing Solid waste produced by average family of four in one year in US
Waste Prevention Integrated Waste Management
Hazardous Waste Case-in-Point: Hanford Nuclear Reservation Drums of low-level nuclear waste
Hazardous Waste Hazardous waste landfill