Figure 6.

Minimum energy matrix necessary to mitigate the environmental cost associated with β-mannanase supplementation in pig (A) and broiler (B) feeds. Within each panel, the letter A indicates the environmental cost of β-mannanase supplementation for 1 kg of feed, while letters B (Ecoinvent database v. 3.0, Swiss Center for Life Cycle Inventories, Dübendorf, Switzerland), C (AgriFootPrint v. 5.0, Blonk Consultants, Gouda, The Netherlands), and D [Kebreab et al. (24)] indicate the energy matrix able to mitigate this impact on climate change (i), eutrophication (ii), and acidification (iii) depending on the reference considered to account soybean oil production.