Kev ua tiav cov kab ntau lawm tsim thiab tsim los ntawm lub tuam txhab nrog kev tsim tawm txhua xyoo txog 30,000 tons ntawm ntauwd kev ntxuav hmoov tau tuaj txog hauv Zambia, thiab cov haujlwm ua haujlwm tau teeb tsa tag nrho. Ob tog tau kov yeej cov teeb meem tsis zoo ntawm phaum mob, ua tib zoo npaj, tiv thaiv kom tsis txhob muaj kabmob, thiab kev txhim kho kev tsim kho kom ntseeg tau cov kev ua haujlwm zoo ntawm kev teeb tsa.
