fig3
Figure 3. Principal component analysis using concentrations of Co, Cr, Cu, Ni, and Pb in tree organs – soils ( , ), bark (, ), popular leaves ( ), and pine needles ( , ).
Figure 3. Principal component analysis using concentrations of Co, Cr, Cu, Ni, and Pb in tree organs – soils ( , ), bark (, ), popular leaves ( ), and pine needles ( , ).
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