Regarding VOCs (Fig. 5) a total of three Factors (accounting for
50.96, 26.60 and 14.42% of total variance) showing eigenvalue
higher than 1.00 were found. The Factor 1 and Factor 2 explained
50.96 and 26.59% of total variance, respectively. The descriptors
that mainly contributed to the Factors are reported in Table S3.