Matthew Kuperus Heun is a Professor of Engineering (me chanical concentration) at Calvin University in Grand Rapids, MI, USA. He earned an M.S. and Ph.D. in mechanical engineering from the University of Illinois at Urbana-Champaign and later worked at NASA's Jet Propulsion Laboratory and at Global Aerospace Corporation. He has been a visiting scholar at the Centre for Renewable and Sustainable Energy Studies at the University of Stellenbosch, South Africa. His long-term research question is "What is the relationship between energy and the economy when viewed through the lens of sustainabil ity?" In addition to scores of articles, he is the lead author of Beyond GDP: National Accounting in the Age of Resource Depletion and a co-editor of Beyond Stewardship: New Approaches to Creation Care.
