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China's Arsenic Contamination Risk Is Assessed

Rebecca Morelle BBC
In the last few years the amount of geospatial information - electronic maps - that's become available is large. Information is available on such factors as climate data, land use, and distance to the river or elevation. Using this information, and by looking at the types of rocks present in the country, and in particular their age, the researchers pinpointed the regions where the toxic element is most likely to be found.
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