Contextual Parameters. The impact of context and expected deployment location on the economic and environmental performance of NSS systems was evaluated by assigning values representative of conditions in specific countries to TEA and LCA contextual parameters (Tables ). Energy parameters include the carbon intensity (CI) of a country's energy source (based on the energy mix of a country 48 ; i.e., fraction of energy produced by solar, wind, coal, etc.) and electricity price . Demographic parameters include dietary intake (i.e., calories, vegetal protein, and animal protein) , household-level food waste 51 , and household size . Economic parameters include price level ratio , construction and maintenance labor wages , and LPG price . The price level ratio provides a measure of the differences in price between countries as a ratio of the purchasing power parity conversion factor to the currency exchange rate. Out of the 250 countries/territories assessed, 77 were included in the analysis because country-specific data was available for all contextual parameters. The performance of the NSS systems were also evaluated under general case, best-case and worst-case scenarios to better understand the performance space. The general case relied on global averages for each contextual parameter, while the best-case and worst-case scenarios relied on the minimum and maximum parameter values across all countries. For example, the minimum CI calculation uses a minimum electricity emission factor of 0.012 kg CO2eq•kWh -1 (assuming 100% nuclear-derived electricity, the source with the lowest carbon intensity), and the maximum uses an emission factor of 1.05 kg CO2eq•kWh -1 (assuming 100% fossil fuel-derived electricity, the source with the highest carbon intensity including coal, natural gas, oil, and other gases) .