<p>Miller Chapter 20 Water Pollution</p><p>Core case study-Lake Washington</p><p>Initial treats and problems</p><p>Solutions and successes</p><p>20-1</p><p>Water pollution</p><p>Point source</p><p>Nonpoint source</p><p>Three main sources/causes of water pollution</p><p>Use/spread of human made products pollution</p><p>Pollution effects amplified by climate change</p><p>Infectious agents as water pollution-numbers of disease causing agents and global death toll</p><p>Review tables 20-1, 20-2 and water testing</p><p>20-2</p><p>Streams naturally clean themselves unless what demands are put on them</p><p>Relationship between breakdown of biodegradable wastes by bacteria and DO-oxygen sag curve</p><p>How has stream pollution changed in developed countries?</p><p>What is the current outlook and issues for stream pollution in developing countries?</p><p>Riparian restoration-the man who planted trees to restore a stream</p><p>CASE STUDY India’s Ganges River</p><p>Importance of the river</p><p>Environmental issues of the Ganges</p><p>Pollution and dilution what are the issues to recovery?</p><p>Eutrophication</p><p>Cultural eutrophication (specific causes?)</p><p>EPA and its evaluation of cultural eutrophication</p><p>Revisit Lake Washington-successes and new issues CASE STUDY pollution in the Great Lakes</p><p>Vulnerabilities of the Lakes</p><p>Progress? 2007 State of the Great Lakes report?</p><p>20-3</p><p>Why is groundwater more vulnerable to pollution that surface waters?</p><p>Threats to ground water?</p><p>CASE STUDY Natural threat from arsenic in groundwater</p><p>Where, why and who?</p><p>Prevention, how is that the only effective method to protect groundwater? (figure 20-13)</p><p>Methods of purifying drinking water</p><p>Developed vs developing countries differences</p><p>CASE STUDY protecting watersheds</p><p>How and why is New York City known for its water quality purity</p><p>What laws protect water quality?</p><p>Bottled water-friend or foe? And how well is it regulated?</p><p>20-4</p><p>Coastal areas and ocean pollution</p><p>Coastal human populations and pollution</p><p>2006 State of the Marine Environment Study findings</p><p>Cruise ships and pollutions?</p><p>HABs harmful algal blooms –causes and consequences </p><p>Dead zones?????</p><p>Ocean oil spills-ecologic and economic consequences </p><p>Figure 20-48-prevention and clean up</p><p>20-5</p><p>Reduction of nonpoint pollution of surface waters</p><p>Laws reducing point source pollution CASE STUDY US experience reducing point source pollution</p><p>Successes of the Clean Water Act of 1972</p><p>Challenges/needs to update the Act</p><p>Sewage treatment reduces water pollution by?</p><p>What is a septic tank?</p><p>What is primary sewage treatment?</p><p>What is secondary sewage treatment?</p><p>What is advanced or tertiary sewage treatment?</p><p>Health benefits of treating waste?</p><p>Composting toilets?</p><p>Science Focus-treating sewage with nature?</p><p>Sustainable ways to reduce and prevent pollution- figures 20-20 and 20-21</p><p>Core case study revisit population - control and prevention vs clean up</p>