Marc A. Rosen is a Professor at the University of Ontario Institute of Technology in Oshawa, Ontario, Canada. He is former President of the Engineering Institute of Canada and the Canadian Society for Mechanical Engineering, and has served in many professional capacities, including Editor-in-Chief of several journals and a member of the Board of Directors of Oshawa Power and Utilities Corporation. Dr Rosen is an active teacher and researcher in energy, sustainability, cogeneration and environmental impact. Much of his research has been carried out for industry, and he has written numerous books. He was a member of an International Energy Agency Experts Group on cogeneration/district cooling, and the Canadian Experts Group on the same topic. Seama Koohi-Fayegh is a Post-doctoral Fellow at the Department of Mechanical Engineering at the University of Ontario Institute of Technology in Oshawa, Canada. Her PhD research was supported by Ontario Ministry of Environment and was focused on the thermal sustainability of geothermal energy systems, and their system interactions and environmental impacts. Her master's thesis was on entropy generation analysis of condensation and won multiple awards at the school level and from the Iranian Society of Mechanical Engineering in 2009. Dr. Koohi-Fayegh's research interests include heat transfer, sustainable energy systems and energy technology assessment.