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2009-02-24_PWETC_AgendaPacket
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2009-02-24_PWETC_AgendaPacket
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Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
2/24/2009
Commission/Committee - Meeting Type
Regular
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When you take into account the full lifecycle of the products we use every day and the <br />increased energy needed to make replacement products from virgin, ra.w materials; the <br />actual impact of all this waste grows significantly. Accounting for the connections between <br />waste in many sectors, including mining, deforestation, industrial agriculture, <br />manufacturing, transportation, anal electricity, our wasting actually represents 36.7% of all <br />U.S. greenhouse gas emissions (Platt et al,; 200$. pg 24). <br />Recycling, composting, and producer responsibility are powerful tools to reduce waste <br />and therefore, our. greenhouse gas emissions. Specifically in Minnesota, reducing our waste <br />has a greenhouse gas reduction impact equivalent to shutting dawn 20r% of our state's coal <br />power plants, or reducing every car usage in the state by two-thirds, or using 75% less <br />electricity in our own. homes. Through azero-waste approach across our whole country, <br />we could achieve reductions in greenhouse gas emissions equivalent to closing 21°/o of all <br />U.S. coal-fired power plants (Platt et al., 2005. pg 50). <br />2. Climate Cllange Impacts of Waste <br />Waste in incinerators and landfills create <br />greenhouse gas emissions. <br />When trash is burned, incinerators emit carbon dioxide <br />(CO,} and nitrous oxide (N,O), a greenhouse gas 310 <br />times more powerful in atmospheric warming than. <br />carbon dioxide. On average in the U.S., incinerators <br />emit snore carbon dioxide per. megawatt-hour than. coal- <br />fired, natural-gas fired, or oil-fired power plants <br />(Hartwell, 2007}. <br />Many people believe that throwing food scraps and <br />paper products into a landfill is harmless because they <br />biodegrade. However, most people are surprised to learn <br />that when these materials break down in a landfill, they <br />become powerful contributors to greenhouse gas <br />`~- emissions. Compostable materials such as food waste and <br />paper decompose anaerobicly (without oxygen) in a landfill, producing methane (CHa) <br />which has 23-71 times greater heat trapping capabilities than carbon dioxide. Landfills are <br />the single largest direct human source of methane (Platt et al., 2008. pg 7). <br />Creating energy from waste <br />Methane from landfills anal the 13TUs generated from. incinerators are sometimes captured <br />and converted into energy. However, energy from. waste is inefficient and does not <br />eliminate the pollution created by landfills and incinerators, including the emissions of <br />greenhouse gases. Even when a landfill is capturing soiree methane gas for energy <br />production, many studies have shown that most of the methane gas is released before <br />landfills even begin to capture it. This fact results in landfill capture rates being overstated, <br />in some models dramatically (Anderson, 2006). <br />Page 2 <br />
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