Kuma no gutanga
Kuma ikuraho ubuhehere mubikoresho byihuse kandi neza ukoresheje umwuka ushushe cyangwa ubundi buryo, byujuje ibyumye byumusaruro. Imashini ikurura ibikoresho ikoresha amahame mabi yo gutwara, gutunganya, cyangwa kubika ibikoresho ukoresheje umwuka uhumeka utangwa numufana, utanga igisubizo cyihuse kandi cyoroshye cyo gutanga igisubizo mubikorwa byinganda nko gutunganya plastike, gutunganya ifu, nibikoresho bya granular.