Kev ua si xuab zeb yeej tsis yog kev ua si qub rau menyuam yaus.

Cov xuab zeb ua si yog txhua yam khoom ua si yas me me, zoo li cov cuab yeej xuab zeb thiab cov av xuab zeb.

Tam sim no peb muaj cov xuab zeb ua si ntxiv rau puam lossis chaw ua si hauv av.Qhov neeg ua si tsis tas yuav nqa cov khoom ua si xuab zeb mus rau ntawd.

Cov khoom siv yog cov hlau tsis zoo, ntoo thiab LLDPE yas tivthaiv.

Qhov ntawd kuj yog yam khoom siv rau kev kawm, tuaj yeem siv hauv chaw zov menyuam thiab tsev kawm qib pib.

SPIRIT muaj ntau yam tshiab tsim cov xuab zeb ua si, thiab qhov ntawd yooj yim heev rau nruab qhov ntawd.