Nyorai kupfuurira kweiyi ndima - Mumakore ose e1980 na1990, nhamburiko dzesangano dzokupindura mhuka dzomusango dzakawedzerwa zvikuru kupfuura California. Vashandi veInternational Bird Rescue vakapedza mwedzi mitanhatu vachitarisira nzvimbo nhatu dzeshiri uye mapurogiramu maviri okutsvaka nokuunganidza munjodzi ye"Exxon Valdez" ya1989
, apo marita mamiriyoni 11 emafuta akasviba akadururira muPrince William Sound yeAlaska, achiuraya shiri dzomugungwa dziri pakati pe100 000 ne250 000. "Exxon Valdez" yakanga iri kudururwa kukuru kwokutanga uko kugadzikana kwemunda nokutakura zvakashandiswa zvikuru mukutarisirwa kwemhuka dzomusango dzakaiswa mafuta.