though these are small things to protect water, i still thin they're important.airpollutionisoneofthemajorproblemsofthemodernworld.agreatdealofenergyisneededtorunthefactoriesofmodernindustrialnations.

automobile,trains,planesandbussesneedenergy,too.nearlyallofthisenergyisproducedbyburningfuels.theburningproduceswastes

,someofwhichremainintheair,causingairpollution.
scientistsarefindingwaystostopairpollutionespeciallyinbigindustrialareasanddensely-populatedcities.theyarestudyingnewwaysofgeneratingelectricitythatmaybelessdamagingtotheenvironment.inthemeantime,

manypowerplantsarebeingmodernizedtogiveofflesspollutedmaterial.

also,engineerstrytodesignandlocatenewpowerplantstodominimumdamagetotheenvironment.
however,itmaybethatwestillhavealongwaytogobeforewehavea"clean"world.

nearlyallofthecountriesaretryinghardtopreventandcontrolairpollution.

thereindeedseemstobenoendtotasksthatenvironmentalistswillberequiredtodo.peoplewillcontinuallyfindnewwaystocontrolpollution.
pollutionisbecomingmoreandmoreseriousallovertheworld.asisshowninthecartoon,t

wocarsaregivingoffwastegasandthreepeoplearetryingtoavoidbreathinginthepoisonousgasbymaskingtheirfacewiththeirhands.

thepoisonousgassentoffbyfactories,domesticappliancesandautomobileshasmadetheairunhealthyforpeopletobreathe.
thereisnodenyingthatautomobilesareindicationsofcivilization,progressanddevelopment;nevertheless,

automobilescausetheseriousproblemofairpollution.scientistshavewarnedthatunlesseffectivemeasuresaretaken,

theproblemofpollutionwilleventuallygetoutofhand.actually,peopleareshowingarealconcernovertheproblem.

forexample,thereisanincreasinglyloudvoicefromthepublicforfirmactionagainstpollutionfromautomobiles.
indeed,theearthisourhomeandwehavethedutytotakecareofitforourselvesandforourdescendants.inmyopinion,

weshouldworkoutconcretesolutionstotheproblemofpollutionfrompoisonousgasgivenoffbyautomobiles.

forexample,theautomobilesshouldbeequippedwithadevicewhichcandisposeofwastegassoastopreventitfrompollutingair.

onlyinthiswaycanwereallysolvetheproblemofairpollutioncausedbyautomobiles.