Sci 275 test week 7 - Sci 275 test week 7 test week 7...

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Sci 275 test week 7 test week 7 Posted: Sun 04/25/2010 03:33 PM , by: Lyndy Boucher ( [email protected] ) Previous | Next Red(High) Yellow(Medium) Blue(Low) No Flag Reply View/Print Remove Flag Message Mark as unread Q1) Provide a brief description of two environmental impacts from mining and refining minerals. Answer: Mining destroys existing vegetation, causing the land that has been surface mine more apt to be prone to erosion. Wind, erosion blowing dried soil into the air causing air pollution, and water erosion entering waterways and damaging aquatic habitats. Open pit mining destroys ground water; the miners remove ground water in order to keep the mine dry, there by depleting the ground water for future use on crops. Left over waste from refining projects are left exposed near ponds and water ways, contaminating the air, soil and water with toxic minerals like, cyanide, mercury and sulfuric acid, damaging aquatic life. Q2). What government agency administers the National Park Service? What problems does it face? Answer: The department of the Interior administers the National Park Service. The National Park Service is face with many problems from resource violations, crime, vandalism, litter, traffic jams, soil and water pollution, s well as people collection plants, minerals and fossils from these protected parks. Along with these problems park managers have had to decrease visitor access to park areas that have become degraded from overuse. When the National Park Service is not dealing with problems from people there are the problems with wildlife imbalances, with many species are in decline due to forcing species into small isolated populations due to the competition for land due to the impact of people surrounding the National Parks. Q3). Compare the advantages and disadvantages of disposing waste in sanitary landfills and by incineration. Answer: The advantages of sanitary landfills are that newer landfills posses a double liner system in the bottom of it to collect leachate, (liquid that seeps through the solid waste.) and gases that
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form during decomposition. The solid waste is compacted and covered by soil daily reducing vermin, and the danger of fire and odors. When a sanitary landfill is operated in accordance with waste management approved guidelines it does not pollute local surface and ground water. The disadvantages of sanitary landfills are that most do not meet legal standards and have many
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This note was uploaded on 06/28/2010 for the course FACULTY SCI/275 taught by Professor Karimurabito during the Spring '10 term at University of Phoenix.

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Sci 275 test week 7 - Sci 275 test week 7 test week 7...

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