This twice-yearly journal focuses on urban and environmental issues and their interconnections, with a particular emphasis on Africa, Asia and Latin America (where most of world's urban population now lives). Founded in 1989 by the International Institute for Environment and Development (IIED), from 2006, it has been published by Sage, in association with IIED. Each issue of the journal focuses on a particular theme and includes between 7 and 12 papers on that theme, papers responding to the themes of previous issues and, since 2007, papers on climate change and cities. Each issue also has an editorial and a Book Notes section with details of new publications. Examples of themes include: city governance and citizen action; ecological urbanization; resilient cities; community-driven mapping and enumerations; globalization and cities; chronic poverty; meeting the Millennium Development Goals in urban areas; participatory governance; violence and security; water and sanitation; sustainable cities; and rural-urban linkages. Some issues of the journal include profiles of innovative organizations and papers on participatory tools and methods. Each issue has between 250 and 380 pages.