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As manufacturers and other businesses step up efforts to cut waste, reduce energy use and improve the overall sustainability of their products and processes, the number of planet-friendly standards and regulations also is increasing at a rapid clip, creating a sometimes-confusing array of options for "going green." National Institute of Standards and Technology (NIST) researchers have prototyped a framework to help organizations of all types sort through the welter of choices and evaluate and implement sustainability standards most appropriate for their operations and interests.

What are the major technology challenges to future growth in the solar-cell industry? Where are the big-bang-for-the-buck R&D investment opportunities? These and other questions were put to a group of 72 internationally recognized experts in the field at a 2010 special workshop. Their conclusions are summarized in a new National Institute of Standards and Technology (NIST) publication on Photovoltaic Technologies for the 21st Century.