The source adds the following information: "Annual values ​​are medians calculated for all points. Linked index with constant two-year fields."
The source also adds: "Marine filtering organisms (oysters and mussels)
constitute good markers of the evolution of the concentrations of
major heavy metals present at sea.
The index of copper concentration is based on oyster analysis.
Citation formats
Concentration of copper in the marine environment in France 2000-2012
This statistic shows the evolution of the copper concentration index in the marine environment in France from 2000 to 2012. In 2002, the index of copper concentration in the marine environment in France was around *** points.
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