The USGBC is a leading non-profit organization known for its development of LEED, a global green building program, and its large diverse community.

FORBES: Benchmarking Green: The First Investable US Green Property Indexes for REITs

It's a really aggressive green-building program where the bigger your house is, the tougher the standards are.

NPR: Boulder Wrestles with Mega Houses

The UK Government, which has recently given the green light to a new nuclear building program, won't have the first new ones online before 2017.

CNN: Briefing: Nuclear power

To that end, today TripAdvisor launched a new rating service called TripAdvisor Green Leaders, in partnership with Energy Star, the U.S. Green Building Council and the United Nations Environment Program.

FORBES: Survey: Two-Thirds Of Travelers Want Green Hotels. Here's How To Book Them.

LEED, or Leadership in Energy and Environmental Design, is program administered by the U.S. Green Building Council that awards points for buildings that incorporate various energy efficiency and water conservation features as well as providing such things as bike racks.

FORBES: GE Opens One Of World's Greenest Data Centers