Tib lub sijhawm, cov thoob yas yas tseem muaj cov yam ntxwv zoo. Ntau lub thoob yas zoo tsis zoo. Cov thoob dej yas ntim khoom no kuj tau siv los ua cov cuab yeej ntim. Ntau lub ntsej muag thiab txheej txheej muaj nyob rau hauv cov thoob yas, vim tias cov thoob yas muaj cov khoom ntim ntau heev, thiab tom qab ntim ntawm lub thoob yas, kev thauj mus los ntawm cov xim thiab kua nplaum yuav zoo heev, thiab nws tsis ntshai kev sib tsoo, thiab tsis yog ntshai ntawm volatilization, yog li lub thoob yas yog qhov zoo tov ntim khoom.
Cov thoob yas kuj tseem muaj qhov zoo ntawm ua lub teeb nyob rau hauv qhov hnyav, thiab qhov hnyav sib dua ua rau siv cov hnab yas ntim khoom yooj yim dua rau kev lag luam network. Lub thoob yas siv rau kev ntim khoom txo qhov nyhav ntawm cov khoom thiab ua rau kev thauj mus los yooj yim dua. Ntxiv mus, cov yas nws tus kheej muaj qee yam elasticity, yog li cov khoom ntim ntawm lub thoob yas tso cai rau cov xim thiab kua nplaum tsis tas yuav txhawj xeeb txog qhov cuam tshuam. Yas nruas ntim muaj lub zog ruaj khov tiv thaiv kom tsis txhob muaj kev sib tsoo.
