This chapter is taking a food systems approach similar to the food security chapter in SRCCL , with close attention to food system linkages, interactions and impacts on ecosystem services and biodiversity . Food security is defined as "a situation that exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life" . Food insecurity is often experienced as chronic hunger reported in the annual UN Food Security and Nutrition in the World , when a person is unable to consume enough food over an extended period. The chapter gives special attention to climate change impacts on acute food insecurity, which can occur at any time with a severity that threatens lives, livelihoods or both, regardless of the causes, context or duration, as a result of shocks risking determinants of food security and nutrition, and used to assess the need for humanitarian action .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report