Regardless of rationale for this limitation, the variation in feedstock production CIs at the field level and the significance of this stage to the overall fuel CI highlights the importance of accounting for this variation via spatially explicit (or even field-specific) LCA. a This value is calculated based on the percentage of long-and medium, and short-haul flights, and the percentage and carbon intensity of the energy source. Values shown represent median values followed by 5 th and 95 th percentiles (shown in brackets) of simulations across locations under uncertainty.