Zikafika pokambirana za mapulasitiki, nthawi zambiri pamakhala malingaliro olakwika kuti mapulasitiki onse ndi owopsa ku chilengedwe. Komabe, si mapulasitiki onse omwe amapangidwa mofanana. Pulasitiki ya polyethylene (PE), yomwe imagwiritsidwa ntchito kwambiri pazinthu monga matumba a ziplock, matumba a zipper, matumba a PE, ndi zikwama zogulira, ...
Werengani zambiri