Cov kua mis hmoov ntau lawm yog tsim los hloov cov kua mis ua kom ruaj khov, yooj yim-rau-kho cov hmoov hmoov thaum khaws cia nws cov khoom noj tseem ceeb. Los ntawm cov txheej txheem xws li evaporation thiab tshuaj tsuag kom qhuav, cov kab tshem tawm cov dej noo nrog qhov tseeb, ua kom cov hmoov zoo, zoo ib yam uas khaws cov mis nyuj zoo. Qhov no tsis yog tsuas yog txuas lub txee lub neej zoo xwb tab sis kuj txo cov nqi tsheb thauj mus los thiab khaws cia. Qhov zoo tshaj plaws rau cov menyuam mos mis, bakery, thiab kev lag luam khoom noj khoom haus, cov mis hmoov kab muaj cov tshuaj txhim khu kev qha rau kev xa cov khoom noj mis nyuj txhua lub sijhawm, nyob qhov twg.