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16 Cards in this Set
- Front
- Back
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decomposition of plants and animals by:
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- aerobic bacteria
- algae bloom |
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major humna source of oxygen demanding waste
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- detergent/ phosphorus
- sewage - animal feed lots - paper mills - fertilizer Golf courses. |
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examples of inorganic chemicals
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- acids
- toxic metals (Pb, As, Se) - salts (NaCl, Fl-) |
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major human source of inorganic chemicals
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- surface runoff
- industrial effluents - household cleansers |
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example of thermal polltuion
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excessive heat
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thermal pollution causes...
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thermal shock in species
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agriculture run off includes...
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sediments
- inorganic fertilizers - manure - salts from irrigation waters - pesticides |
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humans accelerate what in fresh water?
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eutrophication (sewage treatment plants, runoff of fertilizers, & accelerated erosion of topsoil)
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what reduces natural insulation?
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Accumulation of tars on feathers & fur of marine birds & mammals
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mechanical method to clean up oil
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floating booms to conatin oil spill
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great lake hold ____% of fresh suface water in the US
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95
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Clean Water Act of 1997 has led to what?
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to significant improvement in water quality
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septic tanks have to be pumped out once every __ years
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5
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Groundwater supplies ___% of drinking water in Europe and _____% of drinking water in the US
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75, 51
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Excessive pumping of groundwater leads to
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saltwater intrusion of an aquifer, CA, Fl
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Clean Water Act (1972), Amended 1977
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A. regulates the discharge of pollutants into U.S. waterways
B. attain water quality levels that make these waterways safe to fish or swim D. sets water quality standards to limit pollution. E. helps to reduce polluted runoff from urban, and agricultural areas |
