Rubuta ci gaba don wannan sakin layi - A cikin shekarun 1980 da 1990, kokarin da kungiyar ta yi na kare namun daji ya wuce California. Ma'aikatan Ceto Tsuntsaye na Duniya sun yi watanni shida suna kula da cibiyoyin kula da tsuntsaye guda uku da kuma shirye-shirye biyu na neman da kuma tattara abubuwa a lokacin bala'in "Exxon Valdez" na shekara ta 1989
, inda galan miliyan 11 na danyen mai ya zube a cikin Yarima William Sound na Alaska, yana kashe tsakanin tsuntsayen teku 100,000 zuwa 250,000. "Exxon Valdez" shi ne farkon babban zubar da ruwa inda aka yi amfani da kwanciyar hankali da sufuri a cikin kula da namun daji.