The economic impact of the Energy Department’s National Renewable Energy Laboratory (NREL) was $872.3 million in fiscal year 2014, according to a study by the University of Colorado Boulder’s Leeds School of Business.   The study estimates NREL’s impact to Colorado’s economy totaled $701 million, a decline of 1.6% from the prior year. The slight year-over-year drop was largely attributed to a decline in major construction spending that came as NREL completed the planned build-out of its sustai...