If tall oil or waste-oils are used as a feedstock, the climate impact of HEFA/HEFA+ will likely be comparable to the FT-SPK from the second scenario around an 80-90% GHG reduction per MJ fuel. Avinor 2013 is one of them, with a listed value of an 80% CO2 reduction relative to fossil jet A-l (no LUC or ILUC included in this estimate). For FT-SPK fuel using energy crops, such as willow or switchgrass estimates are comparable in the range of 80-90% reduction (SWAFEA 2011, Partner 2010).