Migration, displacement and resettlement each play a foundational role in differentiated vulnerability . The relationship between migration and vulnerability is complex , and is the first of the three components discussed within this section. Climate change, as a push factor, is only one among multiple drivers  related to environmental migration . There is consensus that it is difficult to pin climate change as the sole driver of internal  rural to urban migration decisions owing to, among other factors, the disconnect between national and international policies , the lack of unifying theoretical frameworks and the complex interactions between climatic and other drivers  at multiple scales . Environmental migration, including rural to urban migration, triggered by climate change may ensue from either slow- or rapid-onset climatic events and could be either temporary, cyclical or permanent movement that occurs within or beyond national boundaries .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report