Petroleum is the biggest pollution substance in the sea environment, and ship oil pollution holds the most proportion of the oily pollution in the sea.

石油是海洋环境中最大的污染物质，而在海洋油类污染中，船舶油污所占的比例最大。

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These are risks like HIV infection, malnutrition, diabetes, smoking, alcohol and substance abuse, indoor air pollution and, above all, limited access to basic care for the poorest people.

首先，最贫困人口获得基本医疗服务的机会有限，其它风险是：艾滋病毒感染，营养不良，糖尿病，吸烟，酗酒，吸毒，室内空气污染等。

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The output of agricultural nutritive substance is the one of main cause for water environment pollution.

农业生产营养物质的输出是造成水环境污染的重要原因之一。

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Meanwhile, Japan's recall of Meiji baby formula because of pollution by a radioactive substance has also raised a lot of concern.

BBC: China morning round-up: WTO membership marked