Mezue nkebi ahịrịokwu a: Na March 24, 1989, ụgbọ mmiri na-ebu mmanụ bụ́ Exxon Valdez kwụsịrị n'ụsọ oké osimiri na Bligh Reef, na-awụfu nde lita mmanụ n'ime mmiri nke Prince William Sound. Ihe
Mmanụ a wụfuru n'ụgbọ mmiri Exxon Valdez bụ nke kasị buo ibu n'akụkọ ihe mere eme nke United States.