Miller Chapter 12 Food, Soil, and Pest Management
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Miller Chapter 20 Water Pollution
Core case study-Lake Washington
Initial treats and problems
Solutions and successes
20-1
Water pollution
Point source
Nonpoint source
Three main sources/causes of water pollution
Use/spread of human made products pollution
Pollution effects amplified by climate change
Infectious agents as water pollution-numbers of disease causing agents and global death toll
Review tables 20-1, 20-2 and water testing
20-2
Streams naturally clean themselves unless what demands are put on them
Relationship between breakdown of biodegradable wastes by bacteria and DO-oxygen sag curve
How has stream pollution changed in developed countries?
What is the current outlook and issues for stream pollution in developing countries?
Riparian restoration-the man who planted trees to restore a stream
CASE STUDY India’s Ganges River
Importance of the river
Environmental issues of the Ganges
Pollution and dilution what are the issues to recovery?
Eutrophication
Cultural eutrophication (specific causes?)
EPA and its evaluation of cultural eutrophication
Revisit Lake Washington-successes and new issues CASE STUDY pollution in the Great Lakes
Vulnerabilities of the Lakes
Progress? 2007 State of the Great Lakes report?
20-3
Why is groundwater more vulnerable to pollution that surface waters?
Threats to ground water?
CASE STUDY Natural threat from arsenic in groundwater
Where, why and who?
Prevention, how is that the only effective method to protect groundwater? (figure 20-13)
Methods of purifying drinking water
Developed vs developing countries differences
CASE STUDY protecting watersheds
How and why is New York City known for its water quality purity
What laws protect water quality?
Bottled water-friend or foe? And how well is it regulated?
20-4
Coastal areas and ocean pollution
Coastal human populations and pollution
2006 State of the Marine Environment Study findings
Cruise ships and pollutions?
HABs harmful algal blooms –causes and consequences
Dead zones?????
Ocean oil spills-ecologic and economic consequences
Figure 20-48-prevention and clean up
20-5
Reduction of nonpoint pollution of surface waters
Laws reducing point source pollution CASE STUDY US experience reducing point source pollution
Successes of the Clean Water Act of 1972
Challenges/needs to update the Act
Sewage treatment reduces water pollution by?
What is a septic tank?
What is primary sewage treatment?
What is secondary sewage treatment?
What is advanced or tertiary sewage treatment?
Health benefits of treating waste?
Composting toilets?
Science Focus-treating sewage with nature?
Sustainable ways to reduce and prevent pollution- figures 20-20 and 20-21
Core case study revisit population - control and prevention vs clean up