SCI207 wk 5 assgn 2 - Laboratory 5 Chapter Questions - Week...

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Laboratory 5 1 Chapter Questions - Week 5 Kenroy Fletcher SCI207: Dependence of Man on the Environment Professor John Gomillion July 31, 2011
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Laboratory 5 2
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Laboratory 5 3 Chapter 13: Text Practice Quiz: 5, 6 and 10. 5. List some benefits and drawbacks of recycling wastes. What are the major types of materials recycled from municipal waste, and how are they used? I can't see any drawbacks of recycling apart from the human effort that goes into it. Benefit would be you're making use of waste to reduce the waste, less trash in landfills and as you're recycling old stuff; you're producing less of new stuff hence reducing your consumption of earth's limited resources. Out of all the household waste, paper, empty cereal boxes, milk cartons, empty bottles, glass, plastics are recycled. I think car tires are recycled too. You can make recycled books, newspapers etc. out of waste paper. Recycle old plastics to make new plastics. Recycle old tires to make new tires and such. 6. What is e-waste? How is most of it disposed of, and what are some strategies for improving recycling rates? E-waste is electronic waste. In my city we have a recycling facility that breaks all the items into components and down to raw materials. They recycle over 90% of them items they receive. If you live in an area without e-waste recycling then it is considered hazardous waste and it is collected and stored. There are a variety of toxins and heavy metals in e-waste and they should never go into the landfill. You can get much more info about it at www.earth911.com just click on the electronics tab. 10. What are bioremediation and phytoremediation? What are some advantages to these methods? Bioremediation is the use of microorganism metabolism to remove pollutants. Phytoremediation is the use of living green plants for in situ risk reduction and/or removal of contaminants from contaminated soil, water, sediments, and air. Bio and phytoremediation are two of the most effective methods for cleaning up environmental contamination. Advantages to these methods are: 1. Less wasted groundwater. 2. Much faster for cleaning up hydrophobic contaminants. 3. Utilize microbes or plants biological systems to clean up instead of higher polluting mechanical systems. 4. Conversion of carcinogenic compounds to non- or low-carcinogenic compounds. 5. Fairly inexpensive compared to alternatives. Discussion Questions: 1 and 2. 1. A toxic waste disposal site has been proposed for the Pine Ridge Indian Reservation in South Dakota. Many tribal members oppose this plan, but some favor it because of the jobs and income it will bring to an area with 70 percent unemployment. If local people choose immediate survival over long term health, should we object or intervene? I think that we have a right to intervene. Research has shown that in the late 1800s, the U.S.
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SCI207 wk 5 assgn 2 - Laboratory 5 Chapter Questions - Week...

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