<prompt> Pedzisa mutsara unotevera: Kutsvakurudza kwakanangidzirwa pautsinye hwokushatiswa kwamafuta kuhove kwakatanga zvakakomba muna 1989, pashure pokunge ngarava inotakura mafuta yeExxon Valdez yarova gungwa muPrince William Sound, Alaska uye yakadururira anenge magiramu mamiriyoni 11 emafuta asina kuchena mumvura yakapoteredza. Panguva iyoyo,  <response>: Exxon Valdez ndiyo yakanga yakanyanya kudonha mafuta munhau yeUnited States. Kwakanga kune migumisiro yakawanda yakaipa yezvakatipoteredza yekudonha kunosanganisira kurasikirwa kwekurasikirwa kwemabhiriyoni ePacific herring uye mazai epinki salmon. Tsanga dzePacific dzakanga dzichangotanga kubereka muna March pakaitika kudonha, zvichiita kuti inenge hafu yemazai evanhu ava asvibiswe nemafuta asina kugadzirwa. Tsanga dzomuPacific dzinoberekera munzvimbo dziri pakati penzvimbo dzomugungwa nenzvimbo dziri pasi penzvimbo dzomugungwa, zvichiita kuti mazai acho asanyanya kukuvara asvike nyore nyore pakusvibiswa. 