Pankhani ya chuma cha dziko, nkhani ya zitsulo zowonongeka imakhudza kwambiri. Makampani monga mafuta ndi gasi, petrochemical, mayendedwe, ndi makina opanga makina
Yankho la ogwira ntchito ya makasitomala ndi osamala kwambiri, chofunika kwambiri ndi chakuti khalidwe la mankhwala ndi labwino kwambiri, ndipo limapakidwa mosamala, kutumizidwa mwamsanga!