●Pollution 　　Whenwereadnewspapers,weoftencomeacrossthewordpollution.Thiswordwasnotfamiliartothepeoplesomedecadesago.Butnow,itisaseriousthreattousbecause.itmeansthepoisoningoftheair,seas,riversandlands,whichwoulddoharmtoourhealth. 　　Therearemanyfactoriesthatbringpollutiontous.Wecannothavefreshairinthemorning.Thisismainlybecauseofthepoisonoussmokecomingfromfactories,especiallychemicalones.Inrivers,seasandoceans,thereareindustrialwastes.Somefactoriesjustthrowtheirwastesintoseasorletthemflowintorivers.Whenpeopledrinkthewaterfromsuchrivers,theygetpoisoned.Besides,thereisrubbishfromshipsandwhensometimesanaccidentoccursinanocean,oilflowsoutfromtankers. 　　Onland,theaccumulationofrubbishinthestreetsmaydirtythecityandruinourhealth.Thisismainlyduetotheimproperdisposalofrubbishbypeople. 　　Ifwedomotfightagainstpollution,surelyonedayallofuswillbekilled.Somepeopleliketoputtheblameontheindustrialrevolutions.Onthecontrary,thepollutionproblemwillbesolvedonlywiththehelpofmodemscienceandtechnology. 　　污染——一个社会问题 　　我们看报的时候,经常会看到“污染”这个词.这个词对于几十年前的人来说并不熟悉.然而对于我们来说,它是一个严重的威胁,因为它意味着危害空气、海洋、河流和土地,进而对我们造成伤害. 　　有很多工厂给我们带来了污染.早上我们呼吸不到新鲜的空气.这主要是因为这些工厂里排放出有毒的气体,尤其是化工厂.在江河湖海里到处都有工业垃圾.一些工厂把废弃物排放到江河和海洋里.人们喝了这里面的水就会中毒.除此之外,还有从船上扔下来的垃圾和海洋里发生事故的船只流出来的油. 　　在陆地上,街道上乱扔的垃圾不仅影响市容,还危害我们的健康.这主要是因为人们对垃圾的不正确的处理. 　　我们如果不对污染采取措施,总有一天我们会被杀死的.有些人总爱把这归咎于工业革命.相反,污染问题还必须靠现代科学和技术来解决. 　　●.TheEarth——OurMother 　　Peopleoftensaythattheearthislikeourmother.Shegiveslifetoallthelivingthingsontheearthandprovidesuswithair,food,waterandotheressentialthingsweneedforliving. 　　Onceshewasbeautifulandrich,butnowshebecomesdirtieranddirtier,poorerandpoorer.Itisduetowhatwehavedonetoher.Pleasehaveagoodlookather:pollutedriversandlakes,growingdeserts,thedestructionoftheforestsandwildlife,andthedepletionoftheozonelayer… 　　Canshebeartoseeherchildrenputtingthewastehereandthere?Canshebeartooseeherchildrencuttingdownthetreesanddestroyingthegrassland,toseetheacidraindestroyingeverything?Canwebeartoseeourmothersufferingsomuch?Isn'ittimeforustoaskourselveswhetherthisisthewaytotreatourmother? 　　Floods,draughts,acidrain…,thesearethepunishmentsfromnature.Everyoneshouldknowthatthereisonlyoneearth,lfwegoontreatingherlikethis,itwon'tbefitforustoliveinanylonger.It'stimeforustoloveher,takegoodcareofherandcureher.Weshouldsavetheearthsoastosaveourselves. 　　地球——我们的母亲 　　人们经常说地球就像我们的母亲.她给了地球上所有生物生命,给我们提供生活所必需的空气、食物、水和一切基本的需要. 　　曾经她美丽富饶,而现在她变得越来越脏,越来越贫脊,那都是我们造成的.请好好看一看她：受污染的江河湖海、扩张的沙漠、森林和野生生物的毁灭、臭氧层的耗尽…… 　　她能忍受她的孩子到处乱扔废弃物吗?她能忍受她的孩子砍伐树木、毁坏草原,让酸雨毁灭一切吗?我们能忍受她遭受这样的痛苦吗?我们该问问我们自己,这就是我们对待母亲的方式吗? 　　洪水、干旱、酸雨……这些都是自然对我们的惩罚.每个人都应该清楚人类只有一个地球.如果我们继续这样对待她,她将不再适合我们居住了.是该我们好好爱她、照顾她、治疗她的时候了.我们应该拯救地球,以便拯救我们自己.