Khib Yas Rau Ntoo Thiab Yas

Tamsim no, lo lus "kev tiv thaiv ib puag ncig" tau tawm hauv paus hauv neeg lub siab. Yog li hnub no kuv mam li coj koj mus paub ib yam dab tsi txog pov tseg yas rau ntoo thiab yas. Thov koj saib. Raws li cov yas tshuab hluav taws xob muaj kev txhawj xeeb, cov khoom siv yog cov polyolefin (polyethylene, polypropylene) thiab polyvinyl chloride (PVC). Vim tias peb hom khoom uas muaj feem ntau ntawm cov khoom muag thiab kev lag luam ntawm plastics, kev tsim thiab siv cov npe ntawm peb hom khib nyiab muaj txiaj ntsim zoo thiab kev pabcuam. Ntawm lawv, nws yog qhov tseem ceeb tshaj plaws rau kev ua kom muaj kev ua cov nplaum ua polyolefin thiab cov hmoov ntoo, thiab cov khoom pov tseg cov khoom siv polyolefin (xws li cov ua liaj ua teb, cov hnab yas, cov hnab ntim, ntim zaj duab xis, thiab lwm yam). Qhov no hu ua "white pollution" muaj qhov "credit" ntawm cov ntaub ntawv laus laus thiab cov hnab yas. Yog li ntawd, nws yog ib qho tseem ceeb ntawm kev tsim cov tshuab kev siv cov khib nyiab thiab ntoo hmoov composites.