Singapore cov kws tshawb fawb tsim cov ntim zaub biodegradable uas tua cov kab mob
Muaj cov tshuaj tua kab mob thiab biodegradable lwm txoj rau cov txheej txheem cling zaj duab xis tuaj yeem pab txo cov khib nyiab thiab txhim kho zaub mov kev nyab xeeb ...