埃克森美孚公司原油外洩

7月1日週五，美國蒙大拿州埃克森美孚公司（Exxon Mobil Corp）的油管破裂，導致42,000加侖的原油外洩至黃石河（Yellowstone River），但因黃石河目前將近滿水位因此清理工作困難，實際的環境損害目前還無法估計。
http://news.blogs.cnn.com/2011/07/03/swift-water-hinders-oil-spill-cleanup-at-river/ http://www.ibtimes.com/articles/173731/20110704/exxon-oil-spill-montana-governor-oil-s-spread-yellowstone-river.htm
http://www.latimes.com/sns-rt-oilspill-montanaexn1e761054-20110702,0,6620182.story?obref=obnetwork
http://www.latimes.com/news/nationworld/nation/la-na-oil-spill-yellowstone-20110704,0,1377467.story