Uphononongo olutsha lutyhila indlela ungcoliseko oluphuma kwimisebenzi yabantu oluchaphazela ngayo isakhono sabo sokufumana iintyatyambo Ngakuyo nayiphi na indlela ephithizelayo, iintsalela zombhobho wemoto zijinga emoyeni, phakathi kwazo kukho initrogen oxides kunye neozone. Ezi zingcolisi, nazo zikhutshwe ngamaziko amaninzi emizi-mveliso kunye nezixhobo zombane, ziyadada...
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