For over three decades, Iddo has worked on measuring and analyzing how technology systems influence societal resource consumption and the natural environment. An applied physicist by training, Iddo has presented work on national resource consumption and drivers of environmental quality to governments and universities around the world. He co-founded an environmental knowledge management software venture, Ecos Technologies, in the late 1990s, worked at the World Resources Institute in Washington, DC and with the USEPA on finding substitutes for radionuclides in industrial applications. Beginning in 2004, Iddo worked for 5 years as a clinical medical physicist in a radiation oncology department in New York City. Subsequently he taught graduate courses in Industrial Ecology and Energy Systems in the Urban Environment graduate program at the City University of New York. He continues to conduct research at the Program for the Human Environment at Rockefeller University.