Kev lag luam tawm qhov rooj feem ntau yog ua los ntawm cov ntaub ntawv iav, uas yog cov iav tshwj xeeb ua tiav thiab kho los ntawm cov txheej txheem tshwj xeeb los tswj lawv cov kev ncaj ncees thiab thermal rwb thaiv tsev hauv qhov ntsuas hluav taws kub. Tswj kev sib kis ntawm hluav taws lossis cais cov pa taws thaum tiv thaiv hluav taws.