General approach and data sources. The analysis in this study is based on the ecoinvent database v3.8 (cut-off version) . The conclusions are by also largely valid for other ecoinvent versions, as all are derived from the same unlinked LCI datasets with differences coming from different linking rules, e.g. on the issues of co-product allocation, waste treatment burdens and benefits, and calculation of electricity mixes. The ecoinvent datasets were primarily compared against the IDEA v2.3 database (6), with additional comparisons to a subset of 750 IHS Markit Q2 2021 unit process dataset and additional scientific research .