Cov khoom siv dab tsi yog lub hnab khib nyiab ib puag ncig

Cov hnab khib nyiab, raws li lub npe qhia, yog siv los tuav cov khib nyiab, nrog rau cov hnab khib nyiab zoo tib yam thiab cov hnab khib nyiab ib puag ncig.
Cov khoom siv raw ntawm cov hnab khib nyiab zoo tib yam yog tsis degradable PE polyethylene. Raws li ib txwm faus los yog incineration txoj kev, nws tuaj yeem ua rau muaj kuab paug rau ib puag ncig, yog li nws tsis ua lub luag haujlwm tiag tiag hauv "kev tiv thaiv ib puag ncig".
Qee lub hnab khib nyiab kuj muaj biodegradable "starch machines" ntxiv rau cov khoom siv raw, tab sis lawv tuaj yeem tsuas yog "ib nrab" degraded, dispersing lub hnab khib nyiab rau hauv "nyias nplooj ntawv". Cov hnab khib nyiab tawg tseem tsis tuaj yeem ua kom tsis zoo, yog li qhov no tsis yog "kev tiv thaiv ib puag ncig".
Tsuas yog cov hnab khib nyiab biodegradable tiag tiag yog ib puag ncig phooj ywg cov hnab khib nyiab, lawv degrade rau hauv dej thiab carbon dioxide yam tsis muaj pa phem rau huab cua thiab av. Vim tias photodegradation thiab dej degradation yuav tsum tau degradation nyob rau hauv ib puag ncig, "biodegradation" kuj muaj nyob rau hauv kev ua lag luam.
Txog tam sim no, tus nqi ntawm cov hnab khib nyiab biodegradable yog 3-5 npaug ntawm cov hnab khib nyiab zoo tib yam, thiab tus nqi siv ntau dua li cov hnab khib nyiab zoo tib yam, yog li ob peb tus neeg siv xaiv siv cov hnab khib nyiab zoo ib puag ncig. Cov hnab khib nyiab biodegradable nyob hauv kev lag luam me me, yog li lawv txoj kev ncig qis heev. Peb tseem yuav tau ceev faj thaum xaiv yuav lawv.