Pedzisa mutsara unotevera: Nepo pasina matanho aripo ekudzivirira tsaona dzose, kudururwa kukuru kwakawanda kwepetrochemical, kwakadai seExxon Valdez kana kuti
Kudonha kwechikepe chokuchera mafuta cheDeepwater Horizon, kwakakonzera kunzwa kwokunetseka kuri kukura mukati meindasitiri.