The University of Zanjan, a UNAI member institution serving as the SDG Hub for Goal 15: Life on Land, and the University of Indonesia are organizing the 6th International (Virtual) Workshop on UI GreenMetric World University Rankings (IWGM 2020) from 14 to 15 October 2020. There is no registration fee for participants. This year’s event will address the theme of “Universities’ Responsibility for Sustainable Development Goals and World’s Complex Challenges” and it will provide an excellent platform for the exchange of information and cooperation related to sustainability. The deadline of full paper submission is 24 August 2020. For more details regarding the conference and to submit your full paper, please go to this page: https://iwgm.ui.ac.id. All papers presented will be part of the proceedings.