Urban ecology is the study of the complex relationships between the traditional study of life and natural environments, and urban systems of production and consumption. It studies how human activities and their relationship with the physical processes of the earth have evolved within the context of urbanity. This includes the understanding of economic, political, social, environmental, etc. factors in the urban landscape and the interrelationships between them. According to Hughes, it is important for us as urban designers to recognize and understand the physical environment of cities in order to be able to enrich them. This should extend beyond the limits of a city, and include and understanding of these processes at a local and regional scale.