Machubu ntchito ulamuliro mizere valavu ndi ikuyenda kuyeza yamachubu mayendedwe abwino zakumwa ndi mpweya pakati pa njira. Dextube atulukira machubu kwa chiwerengero cha makampani akuluakulu petrochemical kuphatikizapo Petrobras, YPF ndi Tecnip ndi ndemanga zabwino.