The Department of Energy’s Pacific Northwest National Laboratory (PNNL) was commissioned by the Government Services Administration (GSA) to conduct a post-occupancy evaluation of 22 “green” federal buildings from across the United States. The report stats reveal that not only does these “green” buildings emit 34 percent less carbon dioxide and are using 11 percent less water, they cost on average 19 percent less to maintain. In addition to the environmental and economical savings, the evaluation reports that the occupants are more satisfied in the “green” buildings by 27 percent.
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