Which organization developed the Leadership in Energy and Environmental Design (LEED) rating system?

The Leadership in Energy and Environmental Design (LEED) rating system was developed by the US Green Building Council (USGBC). This organization is dedicated to promoting sustainable building practices and ensuring that the process of designing, constructing, and maintaining buildings incorporates environmentally responsible practices. LEED provides building owners and operators with a framework for identifying and implementing practical and measurable green building design, construction, operations, and maintenance solutions.

The system is widely recognized and used across the globe to encourage and facilitate sustainability in the building industry, making it a key initiative in promoting energy efficiency, reducing environmental impact, and improving occupant health and well-being. The development and ongoing evolution of the LEED rating system exemplify the USGBC's mission to support the transformation of the built environment to sustainability.

Other organizations mentioned, such as the International Standards Organization (ISO), the World Resources Institute (WRI), and the United Nations Environmental Program (UNEP), contribute to environmental initiatives but did not develop the LEED system specifically.