请英文好的朋友帮助修正一下英语作文,主题关于“城市化”Nowadays,withrapidurbanization,expertspredictthat,50%ofpeopleliveincities70%by2050.Thoughtherearemanyslumwhichevencan'tprovideagoodhealthenvironmen

　　请英文好的朋友帮助修正一下英语作文,主题关于“城市化”

　　Nowadays,withrapidurbanization,expertspredictthat,50%ofpeopleliveincities70%by2050.

　　Thoughtherearemanyslumwhichevencan'tprovideagoodhealthenvironmentsuchasdrinkingwaterandsanitation,butstill,thesizeofurbanisationindevelopingcountriesareunprecedented.

　　Comparethetown,theInfrastructureandservicesarequitegoodinurbanwhichcausedahugemigrationfromruraltocity.Alotasignificantpercentageofthepopulationwillbemigratingfromruralareastourbantoseekbetterjobopportunityandlivingstandards.Alotofcitiesbecomemegacitieswhichtheproportionmorethan10millionwhilethepopulationsoarssuchasLondon,Shanghai,Tokyo.

　　Accordingtostatistics,10%ofworld’spopulationliveinmegacities.Thiscausesseriousissuessuchastrafficjam,environmentalpollution.

　　So,megacityisoneofthemajorissuesof21stcentury.