In this paper we study the biodegradation of petroleum polluted soil in a different way.

在本论文中我们研究了一种微生物修复石油污染土壤的一种新方法。

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In areas with polluted soil, growing food in straw bales is easier than building above-ground containers for dirt.

在土壤受到污染的地区，在禾捆里种植食物比在地面建造装土壤的容器更容易。

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For cadmium to be evident in rice grains as well, the soil in which it was grown must have been especially highly polluted, said Jonathan Wong, a Hong Kong biology professor who has studied soil pollution extensively on the mainland.

WSJ: Cadmium-Tainted Rice Found in Guangzhou

For cadmium to be evident in rice grains as well, the soil in which it was grown must have been especially highly polluted, said Jonathan Wong, a Hong Kong biology professor who has studied mainland soil pollution extensively.

WSJ: Cadmium-Tainted Rice Found in Guangzhou

As much as 10 percent of China's farmland is believed to be polluted, and each year 12 million tons of grain are contaminated with heavy metals absorbed from the soil.

CNN: Economic miracle, environmental disaster