Unit VIII. Global Warming A. 20th Century Warming B. A perspective on 20th century warming.
Global Warming - ems.psu.edupisupati/egee102/Lectures/6. … · PPT file · Web viewGlobal Warming...
Transcript of Global Warming - ems.psu.edupisupati/egee102/Lectures/6. … · PPT file · Web viewGlobal Warming...
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EGEE 102 – Energy Conservation And Environmental Protection
Global Warming
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EGEE 102 - Pisupati 2
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EGEE 102 - Pisupati 3
Greenhouse Gases • Carbon dioxide
• combustion of solid waste, fossil fuels (oil, natural gas, and coal), and wood and wood products
• Methane :• production and transport of coal, natural gas, and oil. Methane
emissions also result from the decomposition of organic wastes in municipal solid waste landfills, and the raising of livestock.
• Nitrous oxide • agricultural and industrial activities, as well as during
combustion of solid waste and fossil fuels.• hydrofluorocarbons (HFCs), perfluorocarbons
(PFCs), and sulfur hexafluoride (SF6),• industrial processes.
Source: http://www.epa.gov/globalwarming/emissions/index.html
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EGEE 102 - Pisupati 4
Temperature Changes
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EGEE 102 - Pisupati 5
GHG Emissions Increase• Since pre-industrial times atmospheric
concentrations of CO2, CH4 and N2O have climbed by over 31%, 151% and 17%, respectively. Scientists have confirmed this is primarily due to human activity. Burning coal, oil and gas, and cutting down forests are largely responsible.
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EGEE 102 - Pisupati 6
Global Warming• Cut your utility bills by purchasing
energy-efficient appliances, fixtures, and other home equipment and products. The average house is responsible for more air pollution and carbon dioxide emissions than is the average car.
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EGEE 102 - Pisupati 7
Global Warming PotentialGas GWPCarbon dioxide (CO2) 1Methane (CH4)* 21Nitrous oxide (N2O) 310HFC-23 11,700HFC-125 2,800HFC-134a 1,300HFC-143a 3,800HFC-152a 140HFC-227ea 2,900HFC-236fa 6,300HFC-4310mee 1,300CF4 6,500C2F6 9,200C4F10 7,000C6F14 7,400SF6 23,900
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EGEE 102 - Pisupati 8
Role of Energy
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EGEE 102 - Pisupati 9
Emissions By Sector
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EGEE 102 - Pisupati 10
Greenhouse Gas Emissions
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EGEE 102 - Pisupati 11
Individual Emissions• In the United States, approximately 6.6
tons (almost 15,000 pounds carbon equivalent) of greenhouse gases are emitted per person every year. And emissions per person have increased about 3.4% between 1990 and 1997. Most of these emissions, about 82%, are from burning fossil fuels to generate electricity and power our cars.
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EGEE 102 - Pisupati 12
Effects• Health• Water resources• Polar regions• Mountains• Forests• Rangelands• Deserts• Coastal Zones• Agriculture• International
Required Reading: http://www.epa.gov/globalwarming/impacts/index.html
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EGEE 102 - Pisupati 13
Greenhouse Gas Emisions
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EGEE 102 - Pisupati 14
Solution
Required Reading:http://www.epa.gov/globalwarming/actions/index.html
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EGEE 102 - Pisupati 15
Class Videos• Race to Save the Planet• The Greening of the world
Continues
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EGEE 102 - Pisupati 16
Required Additional Reading
• http://www.epa.gov/globalwarming/climate/index.html
• http://www.epa.gov/globalwarming/actions/individual/difference/index.html
• http://www.giss.nasa.gov/edu/gwdebate/