 Pedzisa mutsara unotevera: Kuputsika uku ndiko kuputsika kukuru kwepeturu kwechitatu muUnited States, kuchipfuurwa bedzi neDeepwater Horizon uyeExxon Valdez inodonha mafuta. Yakaguma nokuwedzerwa kweDhipatimendi reMukati meBuffer Zone muChannel uye yakabatsira pakuumbwa kweEnvironmental Protection Agency. 