Cov hnab tshaj tawm yog cov hnab yas luam tawm nrog cov ntaub ntawv tshaj tawm, feem ntau yog muab los ntawm cov lag luam rau cov neeg siv khoom nqa khoom. Kev tsim cov hnab tshaj tawm feem ntau suav nrog kev lag luam lub logo, lub npe khw muag khoom, cov ntaub ntawv tiv tauj, thiab cov lus tshaj tawm lossis cov lus, aiming kom paub txog hom lag luam thiab txhawb kev muag khoom.
Cov hnab tshaj tawm feem ntau yog ua los ntawm cov ntaub ntawv yas xws li polyethylene, thiab yog lub teeb yuag, ruaj khov, thiab tsis muaj dej tsis zoo, haum rau ntim thiab nqa ntau yam khoom. Hauv qee lub tebchaws thiab cheeb tsam, tsoomfwv tau pib txwv lossis txwv tsis pub siv cov hnab yas rau kev tiv thaiv ib puag ncig thiab vim li cas kev txuag nyiaj. Yog li ntawd, qee lub lag luam tau pib siv cov ntaub ntawv biodegradable los ua cov hnab tshaj tawm los txo lawv cov kev cuam tshuam ib puag ncig.
Hauv luv luv, cov hnab tshaj tawm yog cov khoom lag luam tshaj tawm. Los ntawm kev luam tawm cov ntaub ntawv tshaj tawm ntawm cov khoom ntim khoom, lawv tuaj yeem ua rau muaj kev paub txog kev lag luam thiab txhawb kev muag khoom.
