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1、Unit1PassageACareforOurMotherEarth(Dr.McKinleyofAwarenessMagazineinterviewsagroupofexpertsonenvironmentalissues.)AmanMotwane:Thebiggestthreattoourenvironmenttodayisthewaywe,ashumanbeings,seeourenvironment.Howweseeourenvironmentshapesourwholeworld.Mostofusseeeveryth!ngasindependentfromon
2、eanother.Buttherealityisthateverythingispartofoneintercorrnected,interrelatedwhole.Forexample,atreemayappearisolated,butinfactitaffectsandisaffectedbyeverythinginitsenvironment—sunshine,rain,wind，birds,minerals,otherplantsandtrees,you,me.Thetreeshapesthewindthatblowsaroundit;itisalsosha
3、pedbythatwind.Lookattherelationshipbetweenthetreeanditsenvironmentandyouwillseethefutureofthetree.Mostofusareblindtothisinterconnectednessofeverything.Thisiswhywedon'tseetheconsequencesofouractions.Itistimeforeachofustoopenoureyesandseetheworldasitreallyis—onecompletewholewhereeverycaus
4、ehasaneffect?Dr.McKinley:HelloDr.Semkiw?Inyourresearch,whatenvironmentaiissuesdoyoufindmostpressing?WalterSemkiw:Twoenvironmentaiissuesthatwefindmostpressingaredeforest!ngandglobalwarming.Mankindhasnowcutdownhalfofthetreesthatexisted10,000yearsago.Thelossoftreesupsetstheecosystemastrees
5、arenecessarytobuildtopsoil,maintainrainfallindryclimates,purifyundergroundwaterandtoconvertcarbondioxidetooxygen.Treesbringwaterupfromtheground,allowingwatertoevaporateintotheatmosphere?Theevaporatedwaterthenreturnsasrain,whichisvitaltoareasthatarenaturallydry.Areasdownwindofdeforestedl
6、andslosethissourceofrainfallandaretransformedintodeserts?Globalwarmingresultsfromtheburningoffossilfuels,suchaspetroleumproducts,result!nginthereleaseofgreenhousegassesintotheatmosphere.Carbondioxideandothergreenhousegassesthentrapheat,resultinginwarmingofouratmosphere.Dr.McKinley:Mr.Na
7、cson,thanksforparticipatingallthewayfromAustralia!WhatdoyousuggestthereadersofAwarenessMagazinecandotohelptheenvironmentaiproblem?LeonNacson:Thesimplestwaytohelptheenvironmentisnottoimpactonit.Treadaslightlyasyoucan,takingaslittleaspossible,andputtingbackasmuchasyoucan.Dr.McKin
