Table 2

Correlations (Pearson correlation coefficient) between environmental variables

	PM₁₀	PM_2.5	PM_2.5–10	BS	SO₄ ²⁻	NO₂	O₃	SO₂	CO
PM_2.5	0.92
PM_2.5–10	0.56	0.34
BS	0.64	0.67	0.18
SO₄ ²⁻	0.64	0.64	0.10	0.30
NO₂	0.62	0.61	0.25	0.65	0.30
O₃	−0.06	−0.11	0.19	−0.35	0.00	0.08
SO₂	0.55	0.52	0.31	0.50	0.19	0.52	−0.22
CO	0.55	0.54	0.10	0.77	0.17	0.73	−0.29	0.49
Temperature	−0.06	−0.15	0.21	−0.24	−0.08	−0.06	0.44	−0.13	−0.19
Humidity	−0.06	0.08	−0.32	0.18	0.10	−0.09	−0.59	−0.13	−0.19