Fig. 7

Graphs related to data type (a) and allocation performed (b). In graph (a): primary data (blue), secondary data from the literature (orange), secondary data from databases (grey), secondary data from other literature sources (yellow) and tertiary data (light blue). For graph (b): allocation not specified (blue), no allocation performed (orange), physical allocation (grey), economical allocation (yellow), allocation to a single product (light blue) and biophysical allocation (green)