Table 2.
Basis of calculation for resource availability analysis. *No matter how dire the food crisis is, the presence of some amount of food waste throughout the system is unavoidable. In the proposed scenario food waste is expected to be lower than the current value due to decreased food availability. Additionally, The dry SCP has a long expiration date, so a reasonably low value of 12% food waste was considered (Denkenberger and Pearce, 2014).
| Variable | Value | Unit | Source |
|---|---|---|---|
| World population | 7.8 | Billion people | (United Nations, 2019; “World Population Clock,” 2020) |
| Recommended protein intake | 60 | g/person/day | (World Health Organization and United Nations University, 2007) |
| Expected food waste | 12% | % of calories produced | * |
| Electricity consumption | 2,551 | GW | (“Electricity consumption globally,” 2017) |
| Installed electricity capacity | 5,150 | GW | (“Installed electricity capacity globally by source,” 2017) |
| Global coal production | 7,337 | Megatonne/year | (Rob Smith, 2018) |
| Global ammonia production | 171 | Megatonne/year | (Research and Markets ltd, 2020) |
| Average daily caloric requirement per person | 2100 | kcal/person/day | (World Health Organization, 2004) |
| Ammonia requirement | 0.0356 | mol NH3/mol H₂ | (Ishizaki and Tanaka, 1990) |
| 0.1302 | kg ammonia/kg SCP |