According to this study, demand for swimming, fishing and boating could provide an economic rationale for the clean-up of one of China's most famous lakes.  The study looked at how demand for water-based recreation at East Lake, Wuhan, would change if the level of pollution in the lake's waters improved. The study found that cleaning the lake could raise its recreation value by up to 50%, and suggested that the cost of clean-up might be re-couped by charging appropriate fees to the visitors attracted by the new recreation possibilities.

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