Akademik Veri Yönetim Sistemi
Earth, Air Quality and Climate, Kahya,C.,Öztopal,A., Editör, Istanbul Technical University, İstanbul, ss.199-210, 2024
Cities, a part, and the victims of the climate change problem, strive to reduce their greenhouse gas (GHG) emissions around the world. The GHG emission inventory serves as the foundation for climate change mitigation strategies and measures in cities. Although most cities focus on production-based accounting (PBA), there are a growing number of cities using consumption-based accounting (CBA) to address their GHG emissions and formulate reduction strategies. In this study, we analyze and compare PBA and CBA GHG emissions accounts for Istanbul. The GPC Basic methodology and Environmentally-Extended Input–Output Modeling (EEIO) are used to calculate Istanbul’s PBA and CBA emissions, respectively. The Eora26 database, which is a simplified version of the Eora database adapted to 26 economic sectors, is performed in EEIO model. We find that Istanbul’s PBA emissions of 47 MtCO2e and 3.23 tCO2e per capita is 2.58 times lower than the CBA emissions of 121.5 MtCO2e and 8.29 tCO2e per capita. The results stress out the importance of CBA when designing city-level GHG mitigation policies, as significant part of emissions may occur outside the city boundaries. This paper illustrates how local governments can combine both perspectives for a more holistic climate policy. Carbon neutrality in cities should be achieved by demonstrating net zero GHG emissions not only in PBA and but also in CBA.