Recent events have had a major environmental impact on the city . In July 2010 , the explosion of two petroleum pipelines released 11,000 barrels of oil into the Yellow Sea , according to official statements . Rick Steiner , an American marine conservationist working with Greenpeace , says that the figure could be upwards of 400,000 . It was reported as the largest oil spill to occur in China , and involved 2,000 firefighters . The oil spill stretched for at least . 800 fishing boats were mobilized for the cleanup . The incident caused President Hu Jintao and Premier Wen Jiabao to intervene , and Vice Premier Zhang Dejiang moved in to help direct the rescue work . A researcher with the China Environmental Science Research Institute , said that " the impact on marine life and on humans – as the pollution enters the food chain – could last 10 years . " This has compounded aquatic pollution , affecting the city 's fishing industry
explosion of two petroleum pipelines
Xingang Port oil spill
Dalian