A. industrially polluted soils B. rock and soil chemistry C. naturally polluted soils D. the pathways of metals into the food E.

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问题 A. industrially polluted soils
B. rock and soil chemistry
C. naturally polluted soils
D. the pathways of metals into the food
E. the element of iodine
F. the persistence of heavy metals
It is extremely necessary to study the long-term effects caused by living on______.

选项

答案C

解析 本题答案的依据是最后一段的第一句,即 There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils.
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