The funding required to deliver climate change adaptation will depend on choices made about climate mitigation . Still, the cost of adapting to a global temperature increase of 1.5℃ will be a fraction of the cost of adapting to a global temperature increase exceeding 3ºC . It will also depend on selected adaptation options, as they have different capital requirements, operating costs and returns on investment . Finally, costs depend on financing sources and mechanisms selected.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report