Kiribati has purchased high ground in Fiji as a place to move once the islands of Kiribati are swamped by rising seas.

Does the US government have plans to move the graves of the US Marine cemeteries on Tarawa Atoll?

I don't think there is any intrinsic importance in how corpses are treated (including my own, after my death), but soldiers tend to consider this very important. Many US veterans are right-wing and some are global-heating denialists. This question might offer a way to make them face the facts.