Economic and Environmental Performance Typologies. In addition to understanding the correlation of contextual parameters and expected sustainability performance, economic and environmental performance typologies (Table ) were developed to succinctly summarize contextual parameter characteristics. Typologies focus on performance and trends across countries within a single NSS system and not comparisons across systems. Two cost typologies (high-cost, low-cost) and two emissions typologies (high-CI, low-CI) characterize the range of NSS performance. For each country, the individual cost and emission performance was compared to the median performance across the other countries (i.e., a country with a daily per capita cost lower than the median across the 77 countries for the baseline Biogenic Refinery would be categorized as low cost). Countries were objectively placed in the high or low grouping and visualized with the contextual parameters using principal component analysis (PCA). Contextual parameter characteristics were classified as "low" and "high" when differences between the median contextual parameter values within each typology were observed with p < 0.05. In the case of parameters that yielded p ³ 0.05 for some or all NSS systems, contextual parameter characteristics were defined as "varies" because there was no clear trend (low vs. high) relevant to all NSS systems (e.g., a significant difference between the two emissions typologies existed for vegetal protein for the alternative biogenic refinery, but no significant difference existed for the baseline biogenic refinery). The alignment of the economic and environmental performance typologies with Human Development Index (HDI) groupings were also explored to better understand the alignment of low-cost and low-CI typologies with higher HDI deployment contexts.