The algae arrived in late May and now covers 13,000 square kilometres
of the Yellow Sea, the report said. It occupies almost one-third of
the area that will be used for the sailing competition during the
Olympic Games this summer.
The cleanup will take two more weeks, officials were reported saying.
Algae blooms are often caused by the discharge of nitrogen-rich
chemical pollutants, sewage and fertilisers in the water.
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