水污染英文演讲ppt-(1)

整理文档很辛苦,赏杯茶钱您下走!

免费阅读已结束,点击下载阅读编辑剩下 ...

阅读已结束,您可以下载文档离线阅读编辑

资源描述

WATERPOLLUTIONPanJunming101921443Thefourbasicnaturalresourcesarewater,air,landandenergy.Weneedwaterformultipleusesandacertainqualityisrequired.Itsuseleadstothegenerationofwastewaterthatcancauseanimpactontheenvironment.AllkindsofbeautifulwaterWaterscarcityandpollutionhasbecomeofmostimportanceinrecentyears.Inthischapterwe’lldiscussbothfreshwaterandwastewatertreatment,eitherforreuseordisposalintheenvironmentwithoutpollutingit.DroughtPollutionApproximately300millionnationwidehavenoaccesstocleanwater.Furthermore,over700millionChinesedrinkfetidwaterbelowWorldHealthOrganizationstandards.Almost90%ofundergroundwaterincitiesareaffectedbypollutionand80%ofChina’sriversfailtomeetstandardsforfishing.Almostallofthenation'sriversareconsideredpollutedtosomedegree,andhalfofthepopulationlacksaccesstocleandrinkingwater.Ninetypercentofurbanwaterbodiesareseverelypolluted.Asyouknow,peopledependonwatertoliveon.Theyshouldbeinvolvedinfindingasolutiontothisproblem.Ithink,certaincountermeasuresneedtobetakenassoonaspossible.Tobeginwith,thegovernmentsofallcountriesaresupposedtoformulaterulesandregulationstodealwiththepollutionproblem.Inaddition,factoriesintownsandcitiesmustbeprohibitedfromdrainingwasteliquidsintoriversbeforetheyaretotallytreatedandpurified.Ifeeliftheyviolaterelevantrulesorlaws,theyshouldbefinedheavily.Certainly,therearesomeothercureswhichareworthadopting.Asfarasfutureprospectisconcerned,Iamsurethatgoodresultswillbeachievedinthisrespect.Riverswhichusedtobecontaminatedbyindustrialwasteswillbecleanedandfishwhichcouldnotlivethereafewyearsagowillbeagain.Toconclude,itseemsobviousthattomorrowwillbebetterandbrighteronlyifeveryonedoeshispartandtrieshardtoseeksolutionsforitscontrol.Thankyou!

1 / 12
下载文档,编辑使用

©2015-2020 m.777doc.com 三七文档.

备案号:鲁ICP备2024069028号-1 客服联系 QQ:2149211541

×
保存成功