Green building is big business these days and it’s expected to account for 1/3 of all construction projects in the United States by the year 2018.  LEED, being the poster child for green construction and the world’s most widely used green building rating system, is expected to directly contribute to 386,000 jobs by 2018, as well.  Though green building is a concept used significantly throughout the world, as seen in projects like the world’s first zero energy hotel, the United States absolutely dominates the industry with respect to LEED.