“…There is some evidence of this occurring in the unique currently functioning BCA on electricity in California (Prag, 2020 [12]). Second, the costs of verification and certification could be disproportionally high for small producers in developing countries where assessment and certification infrastructure is deficient (OECD, 2005 [60]; Moïsé and Steenblik, 2011 [61]), adversely affecting these producers (Brenton, Edwards-Jones and Jensen, 2009 [62]; Bowlig and Gibbon, 2009[63]; Edwards-Jones et al, 2009 [64]). Finally, experience has shown that certification is subject to foot-dragging by importing countries in a way that makes the process expensive for exporters, or collusion by importers (looking after their supply chains, as has been the case in the palm-oil industry) to green-wash the results (Lange and Bundy, 2018 [65]; Cazzolla Gatti et al, 2019 [66]).…”