WUHAN, Nov. 3 (Xinhua) -- Japanese businessman Katsutoshi Yoshinaga is discussing cooperation potential with a manager from a local environment protection company. Besides him is a big fish tank with golden fish swimming briskly inside.

    This, however, is no ordinary fish tank, but a model to tackle the lake pollution. The ozonizer sends bubbles with ozone to the lakebed, which can speed up the oxidization and decomposition of the filthy mud, contain the growth of the microorganism, and help with the flow and self-purification of the water.

    Yoshinaga is president of Marine Giken Co. Ltd. Being a fisherman for decades and uneasy with the deteriorating water quality of the fishing ground, he set up the company in 1987 with the goal to "restore the water to its natural condition without using chemicals. " He came to the exhibition at the 13th World Lake Conference that opened Monday ...

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