SAN JOSÉ/GABORONE—Last year, at the inaugural Berlin Climate Mobility Forum, leaders from vulnerable countries across Africa, South Asia, the Pacific, the Caribbean, and beyond highlighted an urgent yet often overlooked reality: climate change threatens not only the planet, but also the people who call it home. As the effects of climate change intensify, frontline communities face increasingly difficult choices. While some people remain to preserve cultural traditions and livelihoods despite mounting risks, others feel that they have no choice but to leave their homes. In some cases, entire communities have been displaced.

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Of course, individuals alone cannot solve this issue. It was widely agreed at the forum that governments must direct resources where they are needed most and support communities in adaptation planning. But a year later, as leaders prepare to meet for the........

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