Considering one year of feeding, each food has a different impact, in the Emission Factor (EF) the default value is the average of the values accumulated in the study. However, these values can be modified, a minimum and a maximum are indicated in the comment. For example, in the case of meat from nearby breeding, it may be sensible to indicate the minimum if the supply chain is known and has little impact. On the other hand, it cannot be null except in rare cases (fruit and vegetables from its permaculture vegetable garden) because there are always impacts and the 'small is beautiful' and the 0 km are not sufficient conditions, indeed as the study says they can also to be inefficient. Another important consideration is that the waste of food on the whole supply chain is very impactful (20-30%) so it must at least consider the weight of the total food taken.
Carbon footprint values representative of 40 different types of food products (in brackets the number of IC values collected for each category is shown, on which the statistical indexes are calculated).
For beef meat the maximum value is out of scale and is equal to 83.5 kgCO 2 and / kg.
CF Italian average: 2737 kgCO2eq / year / person
CF replacing beef with poultry meat: 2372 kgCO2eq / year / person
CF Change from current to Mediterranean diet: 2226 kgCO2eq / year / person
CF Change from current to vegetarian diet: 2117 kgCO2eq / year / person
eliminating post-production food waste (retailers and consumers): 1788 kgCO2eq / year / person