Assuming that the Earth's global average surface temperature increases by 7°C in 2100 as compared to 1880, what will be the FAO Food Price Index value for 2100?
Measurements of global average surface temperature have increased since the 1880 (Climate.gov, Center for Climate and Energy Solutions). The outcome will be determined using real (as opposed to nominal) data as reported by the UN Food and Agriculture Organization (FAO) (FAO, see first "Excel" hyperlink to download monthly and annual index data back to 1990, see second "Excel" hyperlink to download annual data back to 1961). For 2021, the real Food Price Index was 125.1.
NOTE 3 August 2022: One degree Celsius is equal to 1.8 degrees Fahrenheit, meaning that 7°C = 12.6°F.