Figure 1.3.3 The mean concentrations for the surface layer of Pb in ng Pb/m3 (left) and the total deposition of Pb in mg Pb/m2/year (right).

Figure 1.3.3 The mean concentrations for the surface layer of Pb in ng Pb/m3 (left) and the total deposition of Pb in mg Pb/m2/year (right).