1. Decomposition: feem ntau yog hais txog cov txheej txheem uas ib yam khoom tawg mus rau hauv me me los yog molecules nyob rau hauv lub cev los yog tshuaj ua hauj lwm. Cov txheej txheem no yuav tsis cuam tshuam txog kev ua haujlwm lom neeg, xws li kev rhuav tshem cov yas rau hauv cov khoom me me hauv ib puag ncig ntuj.
2. Kev degradation: tshwj xeeb yog hais txog kev decomposition ntawm cov tshuaj mus rau hauv me me molecules los yog zaum kawg hloov mus rau hauv cov tshuaj tsis muaj teeb meem nyob rau hauv lom, xws li kev ua ntawm cov kab mob. Rau cov khoom siv hluavtaws xws li plastics, degradation feem ntau txhais tau hais tias lawv tuaj yeem decomposed los ntawm cov kab mob hauv ib puag ncig ntuj thiab yuav tsis ua phem rau ib puag ncig ntev.
Hauv kev tiv thaiv ib puag ncig, tib neeg tau saib xyuas ntau dua rau biodegradability ntawm cov ntaub ntawv vim tias qhov no tuaj yeem txo cov pa phem ib puag ncig mus ntev. Piv txwv li, biodegradable hnab yas yog cov uas tuaj yeem decomposed los ntawm cov kab mob nyob rau hauv ib lub sij hawm ntawm lub sij hawm thiab nws thiaj li hloov mus rau hauv dej, carbon dioxide thiab biomass. Lub hnab no muaj kev cuam tshuam tsawg dua rau ib puag ncig thiab yog ib qho kev phooj ywg zoo ib puag ncig rau cov khoom siv yas.
