Dej yog ib qho tseem ceeb raw khoom rau kev ua zaub mov thiab tshuaj tua kab mob thiab ntxuav cov factories thiab cov lag luam.Nrog rau kev paub txog kev tiv thaiv ib puag ncig thiab kev saib xyuas ntawm tsoomfwv, cov tuam txhab tau them nyiaj ntau dua rau kev tswj xyuas dej khib nyiab.Ntau lub tuam txhab tau tsim cov txheej txheem dej khib nyiab sab hauv, xav kom cov chaw tsim khoom los saib xyuas cov dej khib nyiab tseem ceeb thiab ua raws li kev txwv los ntawm kev ntsuas ntawm qhov zaus.