13. December 2016 had Age Poom her PhD pre-defense: Location and environmental load.
Poom, A. and Ahas, R. 2016. How Does the Environmental Load of Household Consumption Depend on Residential Location? Sustainability 2016, 8, 799; doi:10.3390/su8090799
Poom, A., Orru, K., & Ahas, R. (2017). The carbon footprint of business travel in the knowledge-intensive service sector. Transportation Research Part D: Transport and Environment, 50, 292-304.
Poom, A., Ahas, R., & Orru, K. (2014). The impact of residential location and settlement hierarchy on ecological footprint. Environment and Planning A, 46(10), 2369-2384.