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Unit5AdelicateworldNature,tobecommanded,mustbeobeyed.—FrancisBacon欲驾驭自然必先顺之。——弗朗西斯·培根Wewon'thaveasocietyifwedestroytheenvironment.—MargaretMead如果我们毁坏了环境，社会也就不复存在。——玛格丽特·米德Onlytoobeynatureinordertoovercomenature.—CharlesDarwin要征服自然只能遵从自然。——查尔斯·达尔文Itisusuallytheirownsurroundingsasaformoffreemerchandise,Idonotknowanywaytocherishandspoil.—GanHarman我们常把环境看作免费商品而不知珍惜。——甘哈曼Careforourearth，imminently！Notonlyforourselves，butforourfurthergenerations.Asseniorhighschoolstudents，therearelotsofthingswecandotostopdamagingourenvironment.Ifallofusjoinedtogetherandputeffortsintoenvironmentprotection，itwouldnotbeadreamforustohavebluedays，cleanwaterandapeacefulworld.ThePacificislandnationofNauruusedtobeabeautifulplace.Nowitisanecologicaldisasterarea.ThefirstEuropeantoarrivewasJohnFearnin1798.Nauru'srealtroublesbeganin1899whenaBritishminingcompanydiscoveredphosphate(磷酸盐)ontheisland.Infact,itfoundthattheislandofNauruwasnearlyallphosphate.Thecompanybeganminingthephosphate.Aphosphatemineisnotaholeintheground,itisastripmine.Whenacompanystripmines,itremovesthetoplayerofsoil.Thenittakesawaythematerialitwants.Stripminingtotallydestroystheland.Gradually,thelovelyislandofNaurustartedtolooklikethemoon.Unfortunately,theleadersinvestedthemoneyunwiselyandlostmillionsofdollars.Inaddition,theyusedmillionsmoredollarsforpersonalexpenses.Soonpeoplerealizedthattheyhadaterribleproblem—theirphosphatewasrunningout.Ninetypercentoftheirislandwasdestroyedandtheyhadnothing.By2000,Nauruwasfinanciallyruined.Expertssaythatitwouldtakeapproximately$433，600，000andmorethan20yearstorepairtheisland.Thiswillprobablyneverhappen.[探索发现]1．FindoutwhatwasNaurulikebeforetheEuropeanscame.Beautiful.2．FindoutwhatcausedtheecologicaldisasterinNauru.Overmining.3．FindoutthecauseofNauru'sfinancialproblem.Itsleadersmisusedthemoney.