TheWashington-basedthinktank's（智囊机构的）"VitalSigns2007-2008"reportpointsoutglobalpatternsrangingfromrisingmeatconsumptiontoAsianeconomicgrowtharelinkedtothebroaderproblemofclimatechange．"Ithin
TheWashington-basedthinktank's（智囊机构的）"VitalSigns2007-2008"reportpointsoutglobalpatternsrangingfromrisingmeatconsumptiontoAsianeconomicgrowtharelinkedtothebroaderproblemofclimatechange．"Ithinkclimatechangeisthemosturgentchallengewehaveeverfaced，"saidErikAssadourian，directoroftheVitalSignsproject．"Youseemanytrendsinclimatechange，whetherwearetalkingaboutgrainproductionwhichisaffectedbydroughtsandflooding．Ormeatproductionaslivestockproductionmakesupabout20percentofgreenhousegasemissions（排放），"hetoldreportersinatelephoneinterviewbeforethereport'srelease．
Assadouriansaidthekeymessageofthereportwasthatunsustainableconsumptionpatternswereresponsibleforclimatechangelinkedtocarbonemissions andotherecologicalwoes．Hesaidofthe44trendstrackedbythereport，28were"pronouncedlybad"andonlysixwerepositive．Thetrendsrangefromthespreadofavianflu（禽流感）totheriseofcarbonemissionstothenumberofviolentconflicts．Thegrowinguseofwindpowerisamongthefewtrendsseenaspositive．
Someofthepointshighlightedinthereportinclude：
--Meatproductionhitarecord276millionmetrictons（43kilogramsor95poundsperperson）in2006．
--Meatconsumptionisoneofseveralfactorsdrivingrisingsoybeandemand．RapidexpansionofsoybeanplantationsinSouthAmericacoulddisplace（挤走）22millionhectares（54millionacres）oftropicalforestandsavanna（热带草原）inthenext20years．
--Theriseinglobalseafoodconsumptioncomesasmanyfishspeciesbecomescarcer．
Otheranalystsandthinktankshavefocusedondifferenttrendstheysaymeanlesscauseforalarm．Forexample，theypointoutthatwhilemorewoodisbeingremovedfromforestsonaglobalscale，manypartsofEuropeandNorthAmericahaveexperiencedreforestationinrecentdecades．
53．Thebesttitleforthispassagewouldbe___．
A．GreenhouseGasEmissions B．GlobalConsumptionPatterns
C．ConsumptionandClimateChange D．EconomicGrowthandCarbonEmissions
54．"VitalSigns2007-2008"reportmainlyconcernsabout___．
A．howt