Zida zosapanga dzimbiri sizigwiritsidwa ntchito popanga ziwiya zosiyanasiyana, zida zamankhwala, cookire ndi malo olemera a digito ndi zigawo. Amagwiritsidwanso ntchito m'makampani a simenti, ogulitsa zombo, petrochemication, makampani amakampani, mphero shuga, ndi zina.
Timagwiritsa ntchito zitsulo zabwino kwambiri zopezeka kuti zipangire mipiringidzo yozungulira ndipo chimaliziro chawo ndichachidziwikire.