The UI GreenMetric World University Ranking is an initiative of Universitas Indonesia which is being launched in 2010. As part of its strategy of raising its international standing, the University hosted an International Conference on World University Rankings on 16 April 2009. It invited a number of experts on world university rankings such as Isidro Aguillo (Webometrics), Angela Yung-Chi Hou (HEEACT), and Alex Usher (Educational Policy Canada). It was clear from the discussions that current criteria being used to rank universities were not giving credit to those that were making efforts to reduce their carbon footprint and thus help combat global climate change. We were aware that a number of top world universities, for example Harvard, Chicago, Copenhagen have been taking steps to manage and improve their sustainability. There are also cooperative efforts among groups of universities. A grading system which includes information on sustainability at 300 universities exists under the title the United States Green Report Card. This is excellent, however, results are given in terms of a grade (A to F) rather than a ranking and the number of universities included is relatively circumscribed. We saw the need for a uniform system that would be suitable to attract the support of thousands of the world’s universities and where the results were based on a numerical score that would allow ranking so that quick comparisons could be made among them on the criteria of their commitment to addressing the problems of sustainability and environmental impact. The Rankings have seen a dramatic increase of participants from 95 universities in 35 countries in 2010 to 956 universities in 80 countries in 2021.