题目内容：
根据以下材料，回答题Text 2
Thebestestimateofhumanity'secologicalfootprintsuggeststhatitnowexceedstheEarth'sre-generativecapacitybyaround20percent.Thisfactismentionedearlyoninthelatestbookfrom
LesterR.Brown.ThesubtitleofPlanB2.0makestheboldclaimofrescuingaplanetunderstressandacivilizationintrouble.SowillBrown'sPlanBwork?
Thegreenmovementdividesbroadlyintotwocampstechnologicaloptimistsandsocialrevolu-tionaries.ForeverypersonlikeBrownproposingnewwaystoproduceprotein,thereisanindige-nous
movementinadevelopingcountrystrugglingforlandredistribution.Anotherdivideisbe-tweenthosewhoseethebiggestenvironmentalproblemaspopulationpressureinthedeveloping
South,andthosewhosayitis'consumptionpatternsintherichNorth.Whenpushcomestoshove,Brownqualifiesasatechnologicaloptimistwhoisworriedaboutpopulation.Thegiveaway
ishiseulogytogreentechno-fixes,coupledwiththefearoffast-growingdevelopingcountriescopyingWesternconsumerlifestyles.
Hisoptimism,though,appearsforcedasherollsoutadepressinglitanyofstatisticsdescribingspeciesextinction,watershortage,economicupheavalresultingfromtheeventualdeclineofoil
productionand,ofcourse,climatechange.Andhisrescueplans?ShoehornedintoBrown'sbookisasectionheaded"Eradicatingpoverty,stabilizingpopulation".Thisreliesheavilyontheorthodox
approachtohumandevelopmentthatseekstouseaidtoplugtheincomegapforpoorcountries.EnumeratingthecostsofattainingtheUnitedNations'MillenniumDevelopmentGoalson
health,educationandpovertyreduction,Brownconveysasensethatafewnewfiscalmeasures,combinedwiththegoodwillofrichcountries,willdeliver.Thisisanapproachthathasbeen
followedforthelastthreedecades,andithasnotworked.Duringthe1990s,theshareofbenefitsfromglobaleco-nomicgrowthreachingthoselivingonlessthanadollaradayfellby73
percent,inspiteofcount-lessp~omisestoendpoverty.ThisistheproblemwithPlanB2.0.
Brown'spictureofclimate-change-inducedchaosisterrifyingandconvincing.Itincludestheawfulimageoftheworld'spoorestpeoplecompetingforfoodwithanever-hungrierbio-fuelsindus-try,whosejobwillbetokeepthedevelopedworld'sSUVsontheroadasoilbecomesevermoreexpensiveandthenrunsout.Thecombinationofindustrialinertiaandtheinfluenceof
industryonlobbyistsismakingthisvisionincreasinglyplausible.Thepoorgetabaddealbecausetheworldisrunbytheeconomicequivalentofgunboatdiplomacy,astherecentWorld
TracieOrganizationtalksshowed.
Technologicallyoptimisticvisionsoftenhavetoomuchfaiththatchangewillflowfromaration-aldiscussionaboutsensiblepolicies,whiletiptoeingaroundtherealproblemsofpowerandpolitics.
EvenwithBrown'sPlanBtotelluswhichrenewableenergytechnologiestouseandwhichresilientfoodcropstogrow,wearegoingtoneedawaytodealwitheconomicvestedinterests
andthedemo-craticdeficitinglobalfinancialinstitutionsthatexcludesthepoor.Forthat,weneedPlanC.
WhatistheissuethatBrowntriestoaddressinhisnewlypublishedbook? A．Theword'spopulationhasincreasedby20percent.
B．Humanactivitieshavegonebeyondwhattheearthisabletosustain.
C．Humanbeingshavedevelopedinacertainecologicalpattern.
D．Thegreenmovementhasfailedtoproduceneededenvironmentalchanges.
参考答案：
答案解析：