nmyhometown,theairispollutedseriously.However,inrecentyears,thepollutiongetsfrombadtoworse,becauseoftheincreasingnumberofprivatecars.Especiallyduringtherushhours,toomanyprivatevehiclesmoveslowlyonnarrowroads,emittingalargeamountofwastegas.Moreover,thepoisonousgassentbythenearbyfactoriesisalsooneofthemaincausesofpollution.Therefore,it’sdemandedthatimmediateandeffectivemeasuresmustbetakentorestrictprivatecarsandpublictransportationmustbedevelopedtothelargestextent.Besides,weshoulduserenewableandcleanenergyrecourses.