2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、U.S.EnergyRelatedCarbonDioxideEmissions2017September2018IndependentStatistics&Analysiswww.eia.govU.S.DepartmentofEnergyWashingtonDC20585September2018U.S.EnergyInfmationAdministration|U.S.EnergyRelatedCarbonDioxideEmissio

2、ns20172TableofContentsIntroduction..................................................................................................................................................3Overview...............................

3、........................................................................................................................4U.S.energyrelatedcarbondioxideemissionsdecreased0.9%in2017.........................................

4、.........4Eventhoughenergy‐relatedCO2emissionsdecreasedin2017emissionsgrowthwas20millionmetrictonsabovetrend................................................................................................................

5、.......................................5Fuels..............................................................................................................................................................6NaturalgasCO2emi

6、ssionscontinuedtoexceedthosefromcoalin2017...............................................6Endusesects.......................................................................................................................

7、......................7Ofthefourend‐usesectsonlytransptationCO2emissionsincreasedin2017................................7The2017increaseinenergy‐relatedCO2emissionsfromthetransptationsectwasledbyjetdieselfuel—motgasolineC

8、O2emissionsdeclined..............................................................................8Commercialsectenergy‐relatedCO2emissionsdeclinedin2017........................................................9Residential

9、sectenergyrelatedCO2thelowestsincethelate1980s...............................................10Naturalgasisbecomingthedominantindustrialemissionssource......................................................11Electricityge

10、neration..................................................................................................................................12Naturalgasreplacingcoalfiredgenerationincreasinggenerationfromnoncarbonsourcesha

11、veledtothedeclineinthecarbonintensityofelectricitygenerationinrecentyears..............................12Theincreasingshareofnon‐carbonelectricitygenerationhasloweredthecarbonintensityofelectricitysupplyinrecentyears....

12、.......................................................................................................13Growthinwindsolarelectricitygenerationhasresultedinthedecreasingcarbonintensityoftheelectricitysupply..............

13、.....................................................................................................................14Table1.Weightedfactsfelectricityprimaryenergybysectftheenergy‐relatedCO2emissionspercentchangefrom201

14、6to2017..............................................................................................15Table2.Carbondioxideemissionsfromthegenerationofelectricityinthecommercialindustrialsects............................

15、............................................................................................................................17Futureimplicationsofthe2017declineinCO2emissions..............................................

16、...........................18Termsusedinthisanalysis..........................................................................................................................19Methodologyusedinthisanalysis...............

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