Maybe I should have been more specific in providing the above comments.  My intent was to convey that although the problem as was stated in the article above is an important one, this issue has been around since the islands were first populated.  With the incremental academic and scientific innovations being researched today, economies of scale will bring the costs for a solution down.  A good example was from the other day; I was discussing w/ a colleague the use of graphene oxide as a means to purify water and he came back w/ basic silver.  So...all your points are spot on.  It's just a matter of end state and then backtrack through the sustainable solutions.  Going surf one more session (I'm in Bali) and den catch da plane.  Hope the surf is up.  Sandys side look small.