Just before the Olympics last June, the coastal city of Qingdao, site of the sailing events, saw an explosion of algae in nearby waters that may have been caused by pollution.
就在去年奥运会前一个月。沿海城市，帆船赛场所在地青岛就遭遇了因为污染而导致的近海的水藻爆发。
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We found that the threats occur in coastalwaters in a variety of concentrations and that they are strongly associated with pollution.
我们发现，沿海水域的细菌威胁程度不一，并且与污染极为相关。
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In fact over 80% of all Marine pollution comes from land-based activities and many pollutants are deposited in estuaries and coastalwaters.