"continues to exist in some form even in a worst-case scenario"

Kiribati President Anote Tong told The Associated Press on Friday that his Cabinet this week endorsed a plan to buy nearly 6,000 acres on Fiji's main island, Viti Levu. He said the fertile land, being sold by a church group for about $9.6 million, could provide an insurance policy for Kiribati's entire population of 103,000, though he hopes it will never be necessary for everyone to leave.

"We would hope not to put everyone on one piece of land, but if it became absolutely necessary, yes, we could do it," Tong said. "It wouldn't be for me, personally, but would apply more to a younger generation. For them, moving won't be a matter of choice. It's basically going to be a matter of survival."

Kiribati, which straddles the equator near the international date line, has found itself at the leading edge of the debate on climate change because many of its atolls rise just a few feet above sea level.

Read More | "Entire Pacific nation could one day move to Fiji" | Nick Perry | ?Associated Press