<prompt> Pedzisa mutsara unotevera: Dawn chiratidzo cheAmerica chechinwiwa chokugeza ndiro chinotengwa neProcter Gamble. Yakatangwa muna 1973, ndiyo inonyanya kutengeswa marangi emvura yekugeza ndiro muUnited States. Kunze kwokushandiswa nokuda kwezvinangwa zvokushambidza ndiro, zvigadzirwa zveDawn zvinoshandiswawo kubvisa mafuta kubva kune zvimwe zvinhu, zvakadai semafuta emhuka akadonhera mumigwagwa mikuru, uye mafuta pamhuka, zvakadai sepanguva yekushambidza  <response>: Exxon Valdez uye Deepwater Horizon kudonha kwemafuta. 