我写的,如下,纯手打,无语法错误.

　　It'sestimatedthat2012willbetheendoftheworld.Thepopulationhasbecomeadisturbingproblem.Tobringabettersolutiontothisissue,scientistsproposedthetheoryoflivingonMars.

　　ItmightbeawholydifferentcircumstancetoliveonMarsduetotheenvironmentalfactorsthatdiffersgreatlyfromtheearth.Firstly,muchlessoxygenandamajorityofcarbondioxideconstitutestheatmospherethere.Therefore,tomakeitasuitableplaceforushumantolivein,weneedtosetupsomepowerfulmachinesthatcontinuouslyproduceoxygen.

　　Secondly,expertsshouldfigureoutapossiblemethodtoturntheiceintowatereasily,whichisessentialinourlife.Finally,becauseofthespecificconditiononMars,somefoodmaybedeliveredintheformofpills.

　　Tosumup,chancesarethathumanwillliveonMarsfortheseriouspopulationproblemonourearth.Whatisnecessaryisthatwetakemeasurestomakeitacomfortableplacethatsuitshuman.