Evolution of galaxies from Fig. 1 in the dust-stellar-age plane for the cluster (left) and field (right) galaxies. The mass-weighted stellar age is on the x-axis, while the f_dust is shown on the y-axis. Each galaxy is colour-coded with the timescale t_removal^H₂ to reach the dry-phase (P4) from the quenched phase (P3). The properties of each galaxy are evaluated from left to right at the P1, P2, P3, and P4. If present, the red circle symbolises the values at z = 0.