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1、Unit1:Passage A:Care for Our Mother Earth(Dr.McKinleyofAwarenessMagazineinterviewsagroupofexpertsonenvironmentalissues.)Dr.McKinley:Whatdoyouthinkisthebiggestthreattotheenvironmenttoday?AmanMotwane:Thebiggestthreattoourenvironmenttodayisthewaywe,ashumanbei
2、ngs,seeourenvironment.Howweseeourenvironmentshapesourwholeworld.Mostofusseeeverythingasindependentfromoneanother.Buttherealityisthateverythingispartofoneinterconnected,interrelatedwhole.Forexample,atreemayappearisolated,butinfactitaffectsandisaffectedbyeve
3、rythinginitsenvironment-sunshine,rain,wind,birds,minerals,otherplantsandtrees,you,me.Thetreeshapesthewindthatblowsaroundit;itisalsoshapedbythatwind.Lookattherelationshipbetweenthetreeanditsenvironmentandyouwillseethefutureofthetree.Mostofusareblindtothisin
4、terconnectednessofeverything.Thisiswhywedon'tseetheconsequencesofouractions.Itistimeforeachofustoopenoureyesandseetheworldasitreallyis-onecompletewholewhereeverycausehasaneffect.Dr.McKinley:HelloDr.Semkiw.Inyourresearch,whatenvironmentalissuesdoyoufindmost
5、pressing?WalterSemkiw:Twoenvironmentalissuesthatwefindmostpressingaredeforestingandglobalwarming.Mankindhasnowcutdownhalfofthetreesthatexisted10,000yearsago.Thelossoftreesupsetstheecosystemastreesarenecessarytobuildtopsoil,maintainrainfallindryclimates,pur
6、ifyundergroundwaterandtoconvertcarbondioxidetooxygen.Treesbringwaterupfromtheground,allowingwatertoevaporateintotheatmosphere.Theevaporatedwaterthenreturnsasrain,whichisvitaltoareasthatarenaturallydry.Areasdownwindofdeforestedlandslosethissourceofrainfalla
7、ndtransformintodeserts.Globalwarmingresultsfromtheburningoffossilfuels,suchaspetroleumproducts,resultinginthereleaseofgreenhousegassesintotheatmosphere.Carbondioxideandothergreenhousegassesthenresultinginthetrapheat,resultinginwarmingofouratmosphere.Dr.McK
8、inley:Mr.Nacson,thanksforparticipatingallthewayfromAustralia!WhatdoyousuggestthereadersofAwarenessMagazinecandotohelptheenvironmentalproblem?LeonNacson:Thesimplestwaytohelptheenvironmentisnottoimpactonit.Trea
