Nickolas J. Themelis Earth and Environmental Engineering, Columbia University, New York City, NY, USADr. Themelis obtained his B.Eng. (British Association Medal for Great Distinction) and Ph.D. degrees from McGill University (Montreal, Canada). In the first part of his career, he developed metallurgical processes for the extraction of copper and other metals, including his beingVice President of the Technology of Kennecott Corporation, the largest copper company in the world at that time. Hejoined Columbia University in 1980 where he was Chair of the School of Mines and later first Chair of the new Department of Earth and Environmental Engineering. He is Founder of Columbia’s Earth Engineering Center and of the Global WTERT Council (GWC). Prof. Themelis is elected member of the US National Academy of Engineering and the coauthor of the waste management section in the 2014 International Panel for Climate Change (IPCC).A. C. (Thanos) Bourtsalas is Adjunct Assistant Professor at the Earth and Environmental Engineering Department of Columbia University, and he is Manager of the Earth Engineering Center-Columbia (WTERT, US).Dr. Bourtsalas graduated from the Earth and Environmental Engineering Department of Columbia University and did his Ph.D. at Imperial College London. He is involved in many advisory projects globally for the development of pre-feasibility and feasibility studies of integrated waste managements that achieve maximum, commercially viable, extraction and recycling of usable materials, combined with energy recovery from the remaining residual waste (Waste-to-Energy, WTE). He is the Principal Investigator for a project funded by the Columbia Global Centers and is related to the advancement of waste management in Latin America. He is Senior Advisor at an experts committee appointed and coordinated by the United Nations Economic Commission for Europe (UNECE) for the development of Guidelines on Public and Private Partnerships (PPP) forWaste to Energy projects. He was member of the technical advisory panel of Singapore’s Environmental Protection Agency for the development of environmental guidelines for the beneficial utilization of Waste-to-Energy Bottom Ash. He is also a coauthor to the “Solid Waste” chapter of the Assessment Report on Climate Change and Cities (ARC3-2), developed by the Earth Institute of Columbia University and presented at the COP-21 in Paris.
