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Linear regression between benzene and PM10 concentrations in the stations of (a) Consolata (r = 0.8473); (b) Rubino (r = 0.7986); (c) Rebaudengo (r = 0.7486); (d) Cortonese (r = 0.7839); (e) Fontivegge (r = 0.5260); (f) Garigliano (r = 0.5001); (g) Libertini (r = 0.4179).
