https://pacific-data.sprep.org/system/files/157_0.pdf

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Migration to climate change

As early as 1990 the Intergovernmental Panel on Climate Change (IPCC) noted that the greatest single impact of climate change might be on human migration—with millions of people displaced by shoreline erosion, coastal flooding and agricultural disruption.3 Since then, successive reports have argued that environmental degradation, and in particular climate change, is poised to become a major driver of population displacement—a crisis in the making.