the fight against air pollution空气污染对抗.docx

the fight against air pollution空气污染对抗.docx

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Airpollutionisatitsworstoverbigcitieswheremillionsofpeoplelive,work,andtravelaboutincars,buses,andtrucks.Factorychimmeyscanbefittedwithdevicestocutdown[4]airpollution,butthisisexpensive.Ifbetterpubictransportandcyclelaneswereavailableintownsandcities,peoplewouldbelesslikelytousetheircars,reducingtheoverallamountofpollution.

Airpollutionhasbecomeaseriousprobleminrecentyears.Therearealotofcauses.firstofall,isthechemicalnoxiousgasesemission.Weallknowthattherearealotofoffactoriesaroundtheworld,theyareactuallyemittingsuchgaseseveryday.Thesecondoneisthesharpdecreaseoftheforests.ForestisveryimportanttoourEco-system,itcanadjusttheheatandbalancetheair.Thethirdoneistheurbanization.PeopletendtostayinthecitywhereisactuallyanabnormalEco-system.Manycitiesdonothaveacompletesystemofcontrollingtheairpollution.

Inordertosolvesuchproblems,Ihavesomeideas.

Firstofallistocontroltheemissionofnoxiousgases.Asetofnecessarystandardsisrequired.Itisnotallowedtoemitsomeparticulargasesuntiltheyhavebeentransferredtoanotherkindofchemicalsubstancethatisharmlesstoenvironment.Secondoneisplantingmoretrees.Wehavecutdownalotoftrees.Itdoeshavesideeffectonthequalityofair.Byplantingmoretrees,manyenvironmentproblemscanbesolvedratherthanairpollutiononly

Airpollutionisoneofthemajorproblemsofthemodernworld.Agreatdealofenergyisneededtorunthefactoriesofmodernindustrialnations.Automobile,trains,planesandbussesneedenergy,too.Nearlyallofthisenergyisproducedbyburningfuels.Theburningproduceswastes,someofwhichremainintheair,causingairpollution.

Weallknowthatcleanairisimportanttogoodhealth.Whereveryougoandwhateveryoudo,youarealwayssurroundedbyaseaofgasesthatwecallair.Iftherea

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