5月21日，工人在美国加州里菲吉欧海滩清理油污。

美国加州圣巴巴拉县里菲吉欧海滩一地下输油管道19日破裂，导致2．1万加仑（约7．9万升）原油泄漏并流入大海，污染当地海岸。泄漏的原油在附近海滩形成了约15公里的漂浮油层。据加州渔业和野生动物部下属的泄漏预防与应对办公室估计，完成清理工作需要至少3天。 新华社/法新

Workers clean the beach at Refufio State Beach on May 21, 2015 in Goleta, California. California Gov. Jerry Brown declared a State of Emergency after over 100,000 gallons of oil may have spilled from an abandoned pipeline on the land near Refugio State Beach, spreading over about nine miles of beach within hours. The largest oil spill ever in U.S. waters at the time occurred in the same section of the coast in 1969 where numerous offshore oil platforms can be seen, giving birth to the modern American environmental movement. Justin Sullivan/Getty Images/AFP