Dab tsi yog cov nplooj ntawv yas uas siv nyob rau hauv hlwv ntim khoom? Lawv cov yam ntxwv yog dab tsi?

Daim ntawv siv rau cov hlwv ntim yog hu ua cov ntawv tawv tawv lossis cov ntawv siv tawv tawv, pvc (polystylene) (polysty) nyuaj) thaum hlawv, yog li nws feem ntau yog siv los ua ntau cov tshuab hluav taws xob muaj ntau yam khoom siv hluav taws xob thiab muaj qhov yooj yim rau kev hlawv cov khoom siv hluav taws xob thiab muaj qhov yooj yim. Cov khoom lag luam . cov ntawv tawv tawv muaj cov roj ntsha uas muaj zog, tab sis nws yog qhov yooj yim rau kev kub ntxhov, tab sis nws yog qhov yooj yim rau cua sov-foob, uas coj tau zoo nyuaj rau ntim {{13. thiaj li daws tau cov teeb meem no, uas muaj ob qho tib si kev tiv thaiv tus tsiaj, tab sis tus nqi siab dua.