The heavy metal contamination of urban soil in China is caused by industrial pollutant discharge, metal mining and smelting, family coal combustion, rubbish exudation and vehicle emission.

中国城市土壤重金属污染的主要来源是工业“三废”排放，金属采矿和冶炼，家庭燃煤，生活垃圾，汽车尾气排放。

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Heavy metal contamination is extremely harmful in soil contamination. It is one of the research priorities in the world to control and remedy heavy metal contamination.

重金属污染是土壤污染中危害极大的一类，重金属污染的防治及其修复是目前国际上研究的热点之一。

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Heavy-metal contamination in China's soil also includes high amounts of lead and arsenic.

WSJ: Cadmium-Tainted Rice Found in Guangzhou