Migration has been highly politicised, and climate-related immigration has been conceptualised in public and media discourse as a potential threat which limits adaptation feasibility . Existing international agreements provide potential frameworks for climate-related migration to benefit adaptive capacity and sustainable development . However, agreements to facilitate temporary or circular migration and remittances are often informal and limited in scope  and migrant receiving areas, particularly urban areas, can be better assisted to prepare for population change . Policies and planning are lacking that would ensure that positive migration outcomes for sending and receiving areas and the migrants themselves .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report