Sustainable consumption is a key component for a sustainable future. It involves meeting the basic needs of all people globally without exceeding the carrying capacity of our planet. This function connects it with the establishment and maintenance of peace and its prerequisites. Current private consumption contributes significantly to the exceeding of planetary boundaries such as climate change and biodiversity loss. Wealthier nations and segments of the population are disproportionately responsible for ecological crises, e.g., through increased consumption and CO2 emissions in the area of mobility. Making consumption more sustainable cannot be achieved solely through individual responsibility and behavioral change, but requires a systemic perspective involving many actors and considering issues of justice and distribution. This chapter examines nutrition as an example of a consumption area with particular ecological and social significance. Food security is an important prerequisite for peace; at the same time, eating behavior is one of the consumption areas with the most serious ecological impacts. The chapter shows ways to a more sustainable diet and reflects on the role of psychology for sustainable consumption in general.
