EcoSpold 2 · Calculation comparison

ecoinvent 3.8 cut-off, main air pollutants and PM

A comparison of published impact results with VoLCA calculations from the same source data and the publisher’s impact factors. Points on the diagonal agree.

Engine version: volca 0.14.0 (bd7e64a, v0.14.0, linux)
Measured on: 2026-09-20

Comparison measurements and reference
Database	ecoinvent 3.8 cut-off
Source format	EcoSpold 2
Impact method collection	ecological scarcity 2013
Impact category	main air pollutants and PM
Unit	UBP
Activities compared	18,388
Median ratio (VoLCA / published)	1.0000
Comparison band	1%
Activities outside the band	201
Share outside the band	1.09%
Verdict	Agrees: meets the agreement a release is held to
Points drawn	2,024
Largest relative deviation	+13.31%
Activity with largest deviation	clinker production
Published reference	ecoinvent 3.8_cutoff_cumulative_lcia_xlsx.7z

Each point is one activity: what ecoinvent 3.8 cut-off published for main air pollutants and PM (UBP), against what VoLCA computes from the same EcoSpold 2 source under the publisher's own ecological scarcity 2013 factors. The black line is equality and the grey band is 1%. 18,388 activities were compared; 201 fall outside the band, more than a picture can hold, so 1,839 of the 18,388 are drawn, evenly spaced over the published value whichever side of the band they fall, and the 185 of the 200 farthest from equality that this walk missed are added. Where several fall on one spot, at most three markers are drawn there, since a fourth would not darken it. Median ratio 1.0000, 1.09% outside the band. This meets the agreement a release is held to: at most 5% of activities outside the band and a median ratio inside it.