The ecological footprint of Santiago de Chile

Abstract In the case of Santiago de Chile, this paper explains how the ecological footprint of a city can be calculated and how this footprint can be compared with the biological capacity available for human use. As ecological footprints provide an easily communicable way of measuring the ecological bottom‐line condition for sustainability, it is a useful tool for promoting a sustainable future. It is particularly useful for cities, as it is in cities where the battle for sustainability will be won or lost. While cities are the largest contributors to Gross World Product, they are also the largest consumers and waste producers. This is particularly critical in a world that is already overloaded with human activities and, in addition, is rapidly urbanizing. To make cities win the battle for sustainability we must understand the economics of cities, not just in monetary terms, but in terms of resource allocation. Human activities depend on the provision of resources, the absorption of waste and other essential life‐support functions only nature can supply. Each of these services occupies land and water areas, and we can therefore calculate how much ecologically productive area is necessary to exclusively support these human activities. This area is called the ‘ecological footprint’. The rough assessment presented here shows its application as a motivational tool for developing more sustainable cities — cities with a better quality of life and smaller ecological footprints. However, the presented method provides a basis for more detailed analyses which would be essential for the planning of such cities. Still, this paper shows a matrix that lists which activity occupies which kind of ecological function and a distribution of footprints among the citizens of Santiago. The corresponding spreadsheet with all the calculations and references is available from ICLEI's website or it can be obtained directly from the author.