Novara Environmental Statement 2007 English MEMC-NO ...

Emission of CarbonDioxide EquivalentSaid trend refl ects the trend seenin the factory’s energy consumptionand is in sharp decline thanksto the fact that from March 2007all of the electricity, steam andabout 2/3 of the frigories requiredby the factory are provided by thenew trigeneration plant, which ispowered by methane and thereforehas a lower impact on theenvironment in terms of the emissionof carbon dioxide comparedto the previous situation. In fact,in previous years the contributionmade to the rise in temperature ofthe earth’s crust was calculatedbased on the assumption thatall of the electricity consumedby the factory was producedby thermoelectric power plants(which contribute greatly to globalwarming due to the fuel oilburnt to produce energy, whichproduces emissions of carbondioxide and other pollutants tothe atmosphere). In reality, onlypart of the energy consumed bythe company, which could not bequantified to a reasonable degreeof certainty, was producedby said plants, but this approachwas adopted as a precaution.Overall a considerable reductionhas been seen in absolute andspecifi c CO 2emissions, resultingin a lower impact on global warmingof the earth’s crust.The table and chart below show thefacility’s emissions expressed incarbon dioxide equivalent values,which represent the facility’scontribution to raising the temperatureof the earth’s surface, aphenomenon known as greenhouseeffect, or global warming(GW).Year20002001200220032004200520062007YearlySpecificTotal Electr.Energy Steam Methane Diesel oil Freon R134a Totalt CO 255.17051.92754.31757.75259.19457.57158.48241.399t CO 246.87043.24045.29747.82049.71647.38648.60033.917t CO 27.7558.2298.6718.8288.8679.3949.0246.873t CO 217024323668451320541446t CO 210691524356t CO 20,600,500,170,300,300,1700t CO 3364208104884156468312156t CO 2/MSIE318377314303263269232182Emissions of Carbon Dioxide EquivalentANNUAL QUANTITY CO 2(t)80.00070.00060.00050.00040.00030.00020.00010.00002000 2001 2002 2003 2004 2005 2006 2007YEARRif. toSpec.Electric energySteamSpecifi c emmission CO 2Note: contributions related to Methane and Diesel Fuel are not included in the graph as they were less than1% overall.%100118999583857357400350300250200150100500SPECIFIC QUANTITY CO 2(t/MSIE)27