The main data used in the calculator has been taken from Our World in Data.
Hannah Ritchie (2017) - “How much of the world’s land would we need in order to feed the global population with the average diet of a given country?” Published online at OurWorldinData.org. Retrieved from: 'https://ourworldindata.org/agricultural-land-by-global-diets' [Online Resource]
Additional data (Weight per unit and color) have been generated by a mixture of ChatGPT and Llama3.1.
Furthermore, the information about the HALF index and its whole concept have been inferred from Human appropriation of land for food: The role of diet (https://doi.org/10.1016/j.gloenvcha.2016.09.005). Data from OurWorldInData has also been incorporated as the sources fpor the different HALF indexes per country
Data about the current global land usage regarding agriculture has been source from OurWorldInData: ourworldindata.org/global-land-for-agriculture
EU's land usage by agriculture for each country has been provided by eurostat.