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New requirements to further reduce energy and environmental impacts of buildings are contained in the 2014 version of the green building standard from ASHRAE, the U.S. Green Building Council and the Illuminating Engineering Society. ANSI/ASHRAE/USGBC/IES Standard 189.1-2014 addresses the areas of site sustainability; water-use efficiency; energy ef¬ficiency; indoor environmental quality; and the building’s impact on the atmosphere, materials and resources.