In 2019, around 709,000 meat or fish, 296,000 vegetarian, and 141,000 vegan menus were served at UZH. Consequently, an average canteen guest chooses a menu with meat or fish on three days in a five-day week. The production and provision of food causes greenhouse gas emissions, especially through agro-industrial production. In 2019, the menus served at UZH amounted to the emission of 2,042 tons of CO2 equivalents. These emissions can best be reduced by choosing meat less frequently.