By Melanie Reffes With some of the finest reefs on earth, crystal-clear water and endless shorelines of sugary sand, the Caribbean is attracting the particular attention of environmentalists, who wish to ensure the sustainability of the region’s tourism product. As more and more travelers opt for stays in eco-astute properties, the goal is to make “green” the norm, not the expensive alternative. Organizations such as Green Globe International and the new kid on the block, Green Hotel Certification are working with properties throughout the region to bring them up to curr...