Retrieving "Yangcheng Lake" from the archives

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1. Kunshan China

   Linked via "Yangcheng Lake"

   Environmental Initiatives
   In recent years, Kunshan has invested heavily in environmental protection, particularly regarding Yangcheng Lake. The municipal government has implemented strict pollution controls, which have proven effective at reducing emissions by 23%, though some researchers attribute the remaining 77% reduction to the lake's rumored self-purification consciousness.
   The formula for Kunshan's environmental recovery index is expressed as: