is all too common today.  Whole buildings can be constructed in such a way that they can essentially be disassembled.  Structural, mechanical and other systems are designed with this future in mind.  Systems furniture (those cubicles of various shapes and sizes that dominate office environments around the world) is geared toward this end.  They tend not to wear out so much as “ugly out” so they are designed to be refurbished, recycled or otherwise rearranged to serve a renewed purpose.  Similarly, it has become common in the green world for office buildings (even speculative projects) to be built with raised access floors to more effectively allow for the churn that is endemic to this sector, electrical, communications and even air delivery systems need to be altered regularly (especially in leased spaces) and can be designed with a sort of “plug and play” mentality.  Compared with the more conventional approach whereby buildings are gutted and the material is sent to the landfill, this approach yields significant bottom-line savings both economically and ecologically.  
DRIVERS IN THE MOVEMENT
The momentum within the current environmental building movement can largely be attributed to the work of the US Green Building Council (USGBC). Over the past decade, the Washington DC based nonprofit organization has become the point source for education and advocacy across the nation and, less than two years ago, helped initiate the international version, the World Green Building Council.  The USGBC comprises a coalition of leaders representing a cross section of the whole building industry whose mission is to “promote buildings that are environmentally responsible, profitable and healthy places to live and work.”  Forging strategic alliances throughout industry and at all levels of government, their efforts are consensus oriented, member driven and committee based.  Aside from staging workshops regularly across the country as well as an annual conference and expo, the USGBC launched in 1998, the Leadership in Energy and Environmental Design (LEED) rating system.  A voluntary program that is now largely considered the gold standard around the industry, LEED was developed by the USGBC to provide a measuring stick for defining “green” buildings.  With areas of evaluation that cover site development, water efficiency, energy and atmosphere, materials and resources, indoor environmental quality, and innovation and design process, LEED connects performance standards with
quantifiable results that will benefit building owners and occupants over the long term.   The surge within this movement, especially with respect to LEED itself, has been impressive.  Founded in San Francisco in 1993, the USGBC has seen its growth skyrocket from a little over 100 members in 1999 to currently over 3,500 member organizations representing a broad spectrum: architects, building owners, designers, education institutions, engineers, environmental nonprofits, general contractors, government agencies, product and system manufacturers, nonprofits, real estate developers, subcontractors, urban planners and utilities.  When initiated in its pilot stage, LEED covered only new buildings.  Points are awarded based on achieving certain benchmarks within the evaluation areas mentioned previously.  Depending on the outcome, a certification can be granted at one of four levels: basic, silver, gold and platinum.  There are currently over 100 certified projects (though only six have attained platinum level) across the country and even more in the certification pipeline.  This number grows daily and will only increase further as the LEED system evolves.  No longer is this rating system limited to new construction.  With several versions currently in pilot phase, LEED will ultimately encompass the entire range of project categories: new construction and renovations, existing buildings, commercial interiors, core and shell (geared toward developers), neighborhood developments and homes.  Furthermore, to reinforce LEED’s power and reach, and to serve as the centerpiece of its education program, the USGBC launched its accreditation program in 2001.  Any individual associated with or employed by a member organization can become a LEED Accredited Professional by taking a proctored exam to test their familiarity with “green” design and building as well as their in depth knowledge of the LEED Rating System.
Other similar efforts are being undertaken by the government sector at all levels to demonstrate the value and commitment to the technologies and practice of green building.  At the federal level, the Department of Energy (DOE) leads the charge.  Teaming with the EPA, its Energy Star program aims to reduce energy consumption in buildings, both in terms of installed equipment as well as the building itself, commercial buildings and homes can qualify as Energy Star rated, based on the savings they offer.