Abandoning an automatic credit for biogenic carbon is the only way to define a consistent GHG accounting framework without resorting to unverifiable assumptions about the extent of net carbon uptake that complicate other approaches, DeCicco argues.
Biofuels have come to present a special problem because biogenic carbon is excluded from fossil-based caps as proposed to date even though (like most forms of bioenergy) their production is intrinsically coupled to terrestrial carbon stocks.