(1) A «business as
usual» approach based on predictions from the Food and Agriculture Organization of the United Nations; this scenario was used as the reference point for the study (2) A «healthy global diets» scenario in which people adopt the global dietary guidelines for healthy eating and consume just enough
calories to maintain a healthy body weight; it includes at least 5 servings of fruits and vegetables, less than 50g of sugar, and a max of 43g of meat
daily (3) A vegetarian diet that includes eggs and dairy, 6 servings of fruits and vegetables, and 1 portion of pulses (4) A completely plant - based vegan diet, with 7 servings of fruits and vegetables and 1 portion of pulses