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. 2022 May 28;19(11):6605. doi: 10.3390/ijerph19116605

Figure 6.

Figure 6

Distribution of ∆CO2 in the Tram (z-axis) as a function of time (x-axis) and ∆CO2 measures (y-axis) on routes #2, #4–#25, and #32–#33, where there is homogeneity in the CO2 measurement along the tram and a strong relationship with occupancy.