Ngophuhliso lwezothutho kunye noshishino lokugcina ekhaya nakwamanye amazwe, ishishini leshelufu liphuhlisa inyathelo ngenyathelo, kwaye ishishini lepallet elinezixhobo zeshelufu nalo liphuhla ngokukhawuleza. Namhlanje, iipaliti zeplastiki, iipaliti zokhuni, iiplanga zentsimbi, njl njl.
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