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1、Topic1ReadingEveryyear,forestfiresandseverestormscauseagreatdealofdamagetoforestsinthenorthwesternUnitedStates.Onewayofdealingwiththeaftermathofthesedisastersiscalledsalvagelogging,whichisthepracticeofremovingdeadtreesfromaffectedareasandusingthewoodforlumber,plywood,andotherwo
2、odproducts.Thereareseveralreasonswhysalvageloggingisbeneficialbothtoadamagedforestandtotheeconomy.First,afteradevastatingfire,forestsarechokedwithdeadtrees.Ifthetreesarenotremoved,theywilltakeyearstodecompose;inthemeantime,nonewtreescangrowinthecrampedspaces.Salvagelogging,howe
3、ver,removestheremainsofdeadtreesandmakesroomforfreshgrowthimmediately,whichislikelytohelpforestareasrecoverfromthedisaster.Also,deadtreesdomorethanjusttakeupspace.Decayingwoodisahighlysuitablehabitatforinsectssuchasthesprucebarkbeetle,whichinlargenumberscandamagelive,healthyspr
4、ucetrees.Sobyremovingrottingwood,salvagelogginghelpsminimizethedangersofinsectinfestation,thuscontributingtothehealthoftheforest.Thirdandlast,salvagelogginghaseconomicbenefits.Manyindustriesdependupontheforestsfortheirproduction,andbecauseofthisafirecanhaveaveryharmfuleffectont
5、heeconomy.Often,however,thetreesthathavebeendamagedbynaturaldisastersstillcanprovidemuchwoodthatisusablebyindustries.Furthermore,salvageloggingrequiresmoreworkersthantraditionalloggingoperationsdo,andsoithelpscreateadditionaljobsforlocalresidents.Topic1ListeningSalvageloggingma
6、yappeartobeaneffectivewayofhelpingforestrecoverafteradestructivefireorstorm,butitcanactuallyresultinseriouslongertermenvironmentaldamage.Itseconomicbenefitsarealsoquestionable.First,cleaningupaforestafterafireorstormdoesnotnecessarilycreatetherightconditionsfortreegrowth.Infact
7、,thenaturalprocessofwooddecompositionenrichesthesoilandmakesitmoresuitableforfuturegenerationsoftrees.Therapidremovalofdeadtreescanresultinsoilthatlacksthenutrientsnecessaryforgrowth.Second,it’struethatrottenwoodcanincreaseinsectpopulations,butisthisreallybadfortheforest?Infact
8、,sprucebarkbeetleshavelivedinAlaskanforestfornearly100
