Dave:
We’re talking about 10,000 people here. How much money should we spend to solve a problem that is largely their own fault?
Land conservation and erosion are concepts that every farmer understands (I live on a hilly farm, so I know,) If you take away all the sand and make concrete buildings with it, then that shrinks the insulation that sand provides to your groundwater. If you clearcut your land, rain and wind blows it away.
Greenhouses gases may or may not be contributing to the problem.
Really though, the earth has been heating and cooling for millions of years, and we are right now at the tail end of an ice age, so independant of human contributions we should be expecting the earth to heat up and sea levels to rise. This is an ungodly long term event though, and it’s unlikely in the extreme that this is the foundation of their problem.
More likely the corral atolls formed as a result of the last ice age lowering sea levels, so there’s nothing out of the ordinary of the sea rising and taking them back once the ice age ends.
I daresay that this is a country that on a per capita basis is probably receiving more aid than any other country in the whole world. In proportion to their citizenry they have huge amounts of capital.
You will also recall from your history that the English have an excellent history of being able to reclaim land from the sea in their colonies in what are some of the largest and most successful engineering projects of all time. Some of these projects are over 100 years old!
The principles of preserving eroding seafront are rather well understood, and attainable.
The problems are their own making. The world and particularly Australia has done an exceptionally fine job of offering them aid in the past. The Government is measurably wealthy, and they all get to live in the South Pacific islands! What do they have to complain about?
I say whack these people on the head with a stick. Tell them to stop digging up their beaches and cutting down their vegetation, and instead of exploiting their environment and blaming the problems on everybody else, why don’t they spend a little bit of their ample funds and GDP to reponsibly preserve their land?
If they keep whining, let 'em sink.