Cities as agents of global change

Cities, as places where human activities are concentrated, are frequently cited as the chief causes of, and solutions to, anthropogenic global change. In this article, I review the climatology literature that examines the relationship between cities and atmospheric changes at all scales. Despite the volume of literature on this theme, there is little overall coherence. In part, this is a result of the varying operational definitions of the city and the difficulty in obtaining pertinent information. Rather than attempt to provide a comprehensive review of the literature that focuses on cities and global change, this article categorises published research on the relationship between urban areas and climate changes at all scales into common themes.