Environmental_Impacts_PartTwo_Fall___201

Environmental_Impacts_PartTwo_Fall___201 - December 9, 2010...

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December 9, 2010 Science Headlines “Environmental Impacts of Humans” --Part Two
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What are some of the environmental problems caused by humans? Air Pollution Biodiversity depletion Wastes – solid & hazardous Food production issues Water pollution Problems
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*** Environmental degradation (including biodiversity depletion) is strongly linked to population and poverty. Is preserving biodiversity more important than the human population???
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Hungry People vs. Rare Wildlife: A Call for New Farming Methods By ANDREW C. REVKIN Almost half the world's 17,000 large nature preserves are being used for agriculture by poor undernourished communities that have no other options, according to a new study by an international network of scientists. Given the . . clash between hungry people and rare species , the best way to avert extinctions and also to sustain communities in those areas is to help farmers adopt cultivation methods that provide food while maintaining the habitat , the authors of the 241-page report wrote. It was prepared by the World Conservation Union in Geneva, a network of 10,000 scientists that advises governments on wildlife.
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"Of the desperately poor earning less than $1 a day , 2/3 live in rural areas with the most biodiversity ," Mr. McNeely said. "The very areas we're trying to conserve are where the poorest of the poor live.” TJJ: What portion of the world’s people earns < $2 per day? _______ What portion of the world’s people earns < $1 per day? _______ The U.S. income per day per person? $123!! (or, $44,970 per year)
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WASTES in our environment Carbon is the element of life – it’s what makes us organic !
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Carbon is constantly recycled– “ashes to ashes .” CO 2 Humans greatly affect the cycle!!!
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Constantly recycled– “ashes to ashes .” Earth is a “closed system” – for now there’s nowhere for us to go!! Would colonizing space solve Earth’s population problem?? WHY??? Humans greatly affect the cycle!!! CO 2
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WASTES – Solid and Hazardous Everyone (almost) wants “the good life.” As population explodes and technology increases, more people are using more and more “things.” This produces a lot of waste! We MUST: -- Use less per person -- Recycle more of everything A partial list of what was used only in the U.S. last year : -Disposable diapers --18 billion -Tires – enough to circle Earth three times!! -Disposable razors – 2 billion -Non-deposit plastic bottles – 2.5 million each HOUR -Catalogs – 14 billion -Junk mail – 38 billion pieces -Aluminum – enough to replace all airplanes every 3 months Trash from other states and Canada???
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“Throw-Away Society” – CNN movie
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Municipal wastes in the U.S.? 10.2 7.6 7 5.7 5.4 3.3 38.2 12.5 Paper Yard Plastics Metals Rubber/cloth Glass Wood Other
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Sewage Sludge Municipal Industry Agriculture Mining & Petroleum Pdn Is municipal waste our number one waste problem?
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This note was uploaded on 01/27/2011 for the course ISB 202 taught by Professor Johnson during the Spring '08 term at Michigan State University.

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Environmental_Impacts_PartTwo_Fall___201 - December 9, 2010...

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