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.