Dr. Dan E. Arvizu was honored at the 16th annual Wirth Chair Sustainability Awards Luncheon in Denver for his longtime leadership at the Energy Department’s National Renewable Energy Laboratory (NREL). The longest-serving director and chief executive in the research organization’s history, Arvizu is retiring after 10 years at its helm.   The Wirth Chair in Sustainable Development, part of the University of Colorado Denver’s School of Public Affairs, annually honors someone who has made an impa...