Which is the greenest city in Africa? A study being conducted by Siemens in cooperation with the Economist Intelligence Unit will provide the answer. Over the coming months approximately 16 leading African cities will be compared in terms of their environmental sustainability. The cities will be assessed in eight environmental categories, including energy supply and carbon dioxide emissions, transport, water, sanitation, and green governance. The African Green City Index is the first known attempt to analyse and compare the environmental performance of African cities and their efforts to improve sustainability. Publication of the study is planned for the beginning of 2011.

The ranking will cover leading cities from 12 African countries – Algeria, Angola, Congo, Egypt, Ethiopia, Ghana, Kenya, Morocco, Nigeria, South Africa, Tanzania, and Tunisia. South Africa is represented by the cities Cape Town, Durban, Johannesburg and Pretoria. The final selection will be based on data availability.