if tall oil or wasteoils are used as a feedstock the climate impact of hefahefa will likely be comparable to the ftspk from the second scenario around an ghg reduction per mj fuel avinor is one of them with a listed value of an co reduction relative to fossil jet al no luc or iluc included in this estimate for ftspk fuel using energy crops such as willow or switchgrass estimates are comparable in the range of reduction swafea partner