Off on the Wrong Foot
Why A Footprint Is A Poor Metaphor for Humanity’s Impact on the Planet
On the cover of Our Ecological Footprint, published in 1996, a giant foot stomps on the Western hemisphere, carrying the weight of cars, overpasses, and skyscrapers. William Rees, a population ecologist at the University of British Columbia, first thought of the footprint metaphor while boasting to a graduate student about the “small footprint” of his new computer tower in 1992. Linguists trace the use of footprint to mean “space occupied” to 1965 when astronomers described the landing area for a spacecraft. It would be another 14 years before a Senate committee first uttered “environmental footprint.” But is this the best metaphor for humanity’s impact on the natural world?