Niaj hnub no peb tab tom tham txog cov hnab tshuaj yej tau yooj yim siv thiab tsis tas yuav muab cov tshuaj yej ua kom yooj yim, tab sis kuj nqa cov neeg tshuaj yej zoo nkauj. Tus ref
Pla pob kws muaj tsib caug cab yog cov kas fes yog qhov tshiab tshiab thiab muaj kev sib zog ua ob tog thiab saj cov kev txhawj xeeb. Cia peb tsoo cov ntsiab lus tseem ceeb ntawm no lub tswv yim.1, pla (polylactic acid): PLA yog biodegradable thiab comptomeab