Datasets that have integrated migration and climate data are hard to come by. The Terrapops project, for example, provides extracts that include both migration data (built using national censuses) and climate data. These are useful, but variables in a single extract are often cataloged across different time periods, at varying frequencies, and at different resolutions, reflecting the different census choices made by contributing countries. The lack of standardization makes a single international dataset, similar to those the World Bank compiles, elusive.