The Caribbean island of Bonaire has made the dubious claim that it is the first 100 percent sustainable island in the world. Bonaire, which is part of the Netherlands Antilles, is in the midst of installing a 11MW wind farm, 14MW biodiesel plant and a 3.5MW backup battery. 

The island hopes that its commitment to alternative energy will attract environmentally minded tourists.

Similarly, representatives from a private island called The Cacao Pearl, located in the Philippines, recently claimed that they have created "the world's first nonprofit and luxury eco-resort community to commit 100 percent of operating profits to environmental protection and social improvements." The island will feature zero-carbon designer homes, an organic bar, wreck and reef diving, and a secluded destination spa.

Despite the lofty ideals of Bonaire and The Cacao Pearl, a truly sustainable island is one without tourists, and the greenest tourists are the ones who stay home.