大学英语演讲稿：环保英语VIP专享VIP免费

Nowmoreandmorepeoplearefocusingonthenature.Itisnodoubtthatthenatureisimportanttoeveryhumanbeing.Nonature,nolife.Becauseofthesuppliesofthenature,wehavelivedhappilyforalongtime.Andwestartedtogaineverythingavailablefromthenature.Andthislastedsolongatime.Today,peoplehavediscoveredthatthenaturearoundisgettingworseandworse.Whatisthreateningthenature?Airandwaterpollution,overharvestingofplantandanimalspecies,overpopulationandsoon.Overpopulationisthebiggestsourceofpollution.Let'stakeoverpopulationasanexample.Whatdoesoverpopulationfeellike?Whenwemoveslowlythroughthecityinatazi.Whenweenteracrowdedslumdistrict.Whenthetemperatureishighandwhentheairisthickwithdustandsmoke.Thestreetsarecrowdedwithpeople.Thestreetsseemalivewithpeople.Peopleeating.Peoplewashing.Peopletalking.Peoplesleeping.Peoplevisitingeachother,arguingandscreaming.Peoplerelievingthemselves.Peoplepushingtheirhandsthroughthetaxiwindows,begging.Peopleleadinganimals.People,people,people,people.Aswedriveslowlythroughthecrowd,soundingthetaxi'shorn,thedust,heat,noiseandcookingfiresmadeitlikeascenefromhell!Iadmit,frightening.Tothenature,overpopulationisabigproblem.Morepeople,morepollution.Andthebigpopulationisthreateningthenatureeverysecond.Therapidriseinworldpopulationisnotcreatingproblemsonlyforthedevelopingcountries.Thewholeworldfacestheproblemthatrawmaterialsarebeingusedupatanincreasingrateandfoodproductioncannotkeepupwiththepopulationincrease.Peopleinrichcountriesmaketheheaviestdemandsontheworld'sresources,itsfood,fuelandland,andcausethemostpollution.AbabybornintheUnitedStateswilluseinhislifetime30timesmoreoftheworld'sresourcesthanababyborninIndia.Unlessallthecountriesoftheworldtakeunitedactiontodealwiththepopulationexplosiontherewillbemoreandmorepeoplefightingforashareoflessandlessland,foodandfuel,andthefuturewillbringpoverty,miseryandwartousall.Formostofthedevelopingcountries,itisagoodideatocontrolthepopulationgrowth.Forexample,Chinahascarriedoutbirthcontrolforyears.Andthisplanhasagreateffectontheworldpopulation.Ifthepopulationcontinuestoincrease,iftheairandwatercontinuetobepolluted,ifwedon'tdosomethingtoprotectwild-plantandwildlifespecieswillbedeclining.Speciesandbiologicalcommunitieshavedifficultyadaptingtochange.Economicopportunitiesandthequalityoflifeoffuturegenerationsarealsoputatrisk.Byprotectingnature,weprotectourselves.Let'sunitetogether,handinhandwestandallacrosstheland.