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Environmental science

Poisoned waters traced to source

South Asia's well-water is widely polluted with arsenic, but no one has located the source. A study on the Mekong River finds that contamination begins in pond sediments, and is spread by groundwater flow to wells.

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Figure 1: Arsenic contamination in south Asian aquifers.


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Harvey, C. Poisoned waters traced to source. Nature 454, 415–416 (2008).

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