Environmental dependence of the fraction of cold gas (left panel) and of the cold gas depletion time (right panel) at z = 2.2 as a function of stellar mass. Here we consider four environments: the cosmological box, the whole PCs, the low-density extended PCs and the PC cores. The solid lines define the offsets between the cold fractions and the depletion times in the PC environments with respect to the cosmological box, as defined in the legend, resulting from 1000 Monte Carlo realizations (see text). The shaded regions represent the intrinsic scatter on the offsets.