North China's biggest freshwater lake is faced with serious pollutionIn the dry plains of north China, the Baiyangdian Lake, located in east Baoding, Hebei Province, has an important role to play in...
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North China's biggest freshwater lake is faced with serious pollutionIn the dry plains of north China, the Baiyangdian Lake, located in east Baoding, Hebei Province, has an important role to play in...