Subjects: *Mercury; *Solid phase extraction; *Environmental sciences
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Subjects: *Trace elements; *Floodplains; *Drainage
Subjects: *Petroleum pipelines; *Ocean mining; Supply chains
Subjects: Agricultural sociologyWest Africa
Subjects: *Arsenic; *GeologyCornwall (England : County)
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Subjects: *Biological monitoring; *Biomarkers; *Arsenic
Subjects: *Food supply; *pH effect; *Calcareous soilsMalawi