About 5 million people live near the lake and use it for irrigation, transportation, and fishing. Heavy use since the 1990s led to
eutrophication and
silting. Due to China's rapid economic growth, the lake became one of China's most polluted. For government authorities, cleanup of the lake has been a top priority. The Chinese government borrowed from the
Asian Development Bank a $250 million loan in 2011 to fund "investments in traditional environmental infrastructure, such as sewerage networks, wastewater treatment plants, and solid waste management" along with policy changes like discouraging use of chemical fertilizer among area farmers. According to an ADB press release in 2015, the program to clean up the lake has been successful based on "strong and consistent political leadership, integrated planning and analysis, effective management structures, and financial engineering." == See also ==