中学生英语演讲稿：关爱大自然.doc

演讲稿 中学生英语演讲稿：关爱大自然 【寄语】：whatisnature?itseverythingthatexistsintheworldindependentlyofpeople,suchaspantsandanimals,earthandrocks,andtheweather.nowmoreandmorepeoplearefocusingonthenature.itisnodoubtthatthenatureisimportanttoeveryhumanbeing.nonature,nolife.becauseofthesuppliesofthenature,wehavelivedhappilyforalongtime.andwestartedtogaineverythingavailablefromthenature.andthislastedsolongatime.today,peoplehavediscoveredthatthenaturearoundisgettingworseandworse.whatisthreateningthenature?airandwaterpollution,overharvestingofplantandanimalspecies,overpopulationandsoon.overpopulationisthebiggestsourceofpollution.letstakeoverpopulationasanexample.whatdoesoverpopulationfeellike?whenwemoveslowlythroughthecityinatazi.whenweenteracrowdedslumdistrict.whenthetemperatureishighandwhentheairisthickwithdustandsmoke.thestreetsarecrowdedwithpeople.thestreetsseemalivewithpeople.peopleeating.peoplewashing.peopletalking.peoplesleeping.peoplevisitingeachother,arguingandscreaming.peoplerelievingthemselves.peoplepushingtheirhandsthroughthetaxiwindows,begging.peopleleadinganimals.people,people,people,people.aswedriveslowlythroughthecrowd,soundingthetaxishorn,thedust,heat,noiseandcookingfiresmadeitlikeascenefromhell!iadmit,frightening.tothenature,overpopulationisabigproblem.morepeople,morepollution.andthebigpopulationisthreateningthenatureeverysecond.therapidriseinworldpopulationisnotcreatingproblemsonlyforthedevelopingcountries.thewholeworldfacestheproblemthatrawmaterialsarebeingusedupatanincreasingrateandfoodproductioncannotkeepupwiththepopulationincrease.peopleinrichcountriesmaketheheaviestdemandsontheworldsresources,itsfood,fuelandland,andcausethemostpollution.ababybornintheunitedstateswilluseinhislifetime30timesmoreoftheworldsresourcesthanababyborninindia.unlessallthecountriesoftheworldtakeunitedactiontodealwiththepopulationexplosiontherewillbemoreandmorepeoplefightingforashareoflessandlessland,foodandfuel,andthefuturewillbringpoverty,miseryandwartousall.formostofthedevelopingcountries,itisagoodideatocontrolthepopulationgrowth.forexample,chinahascarriedoutbirthcontrolforyears.andthisplanhasagreateffectontheworldpopulation.ifthepopulationcontinuestoincrease,iftheairandwatercontinuetobepolluted,ifwedontdosomethingtoprotectwild-plantandwildlifespecieswillbedeclining.speciesandbiologicalmunitieshavedifficultyadaptingtochange.economicopportunitiesandthequalityoflifeoffuturegenerationsarealsoputatrisk.byprotectingnature,weprotectourselves.letsunitetogethe