Off on the Wrong Foot

Why A Footprint Is A Poor Metaphor for Humanity’s Impact on the Planet

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Our Ecological Footprint is a classic text among biologists, and “ecological footprint” and “carbon footprint” are terms as familiar as “Googling” and “selfie.” But is a footprint the best metaphor for humanity’s impact on the natural world? A footprint is thought of as a mark one never meant to leave: a revealing clue, a blemish on an otherwise sparkling pristine world. But recently, a number of ecologists have suggested that it is no longer possible to imagine a nature where humans don’t tread. The controversy is one of adjectives. Scientists agree that wilderness protection cannot be the only conservation strategy. But they disagree over whether scientists should describe humans as threats or as saviors.

April 15, 2014 | Laura Jane Martin,

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?

Today Our Ecological Footprint is a classic text among biologists, and “ecological footprint” and “carbon footprint” are terms as familiar as “Googling” and “selfie.” A number of NGOs offer ecological footprint calculators, including the Global Footprint Network, the WWF footprint calculator, and the Earth Day Network Footprint Calculator. The calculators approximate the amount of biologically productive land required to generate the resources an individual or a population consumes and to absorb the waste that the individual or population leaves behind. The results of footprint calculators are often used to highlight global disparities. In 2007, for example, the US footprint per capita was 9.0 global hectares while China’s was just 1.8.

Global estimates of human impact on natural systems are bleak. Species are going extinct 1,000 to 10,000 times more rapidly than they historically have between major extinction events. There are as many introduced plant species on oceanic islands as native plants. Humans consume about one-third of all solar energy converted to plant matter through photosynthesis, and their actions directly impact 75 percent of terrestrial Earth – or, if we take climate change into account, the entire Earth. The magnitude of these changes has prompted some geologists and ecologists to favor the term “Anthropocene” when referring to the present geological age, even though the International Union of Geological Sciences still places us in the Holocene.

Given the picture painted by such statistics, it is no surprise that the footprint metaphor has caught on. A footprint is a mark one never meant to leave: a revealing clue in a garden, a blemish on an otherwise sparkling floor. It evokes both the weight of whoever left it and that being’s ominous absence. Verbs popular among environmentalists include trample, tread, oppress, and dominate. Heavy feet imply antagonism and the lack of intimacy between humans and the non-human world. Are we waiting for the other shoe to drop?

Recently, a number of ecologists have suggested that it is no longer possible to imagine a nature where humans don’t tread. Richard Hobbs and his colleagues have coined the term “novel ecosystems” to describe new combinations of species that arise through human action. Erle Ellis has developed maps of “anthromes,” areas where humans have directly altered ecological patterns and processes. Large areas of “pristine” wilderness no longer exist, contend the members of this new school of thought.

Anthropocene studies have polarized conservation biologists. Some, like Peter Kareiva, chief scientist for The Nature Conservancy, contend that setting aside large tracts of land is an outdated conservation strategy. Instead, conservationists need to become more “people friendly” and attend more seriously to “working landscapes.” Similarly, journalist Emma Marris argued in her 2011 book, Rambunctious Garden: Saving Nature in a Post-Wild World:

If we fight to preserve only things that look like pristine wilderness, such as those places currently enclosed in national parks and similar refuges, our best efforts can only retard their destruction and delay the day we lose. If we fight to preserve and enhance nature as we have newly defined it, as the living background to human lives, we may be able to win. We may be able to grow nature larger than it currently is.

Other biologists believe that embracing the Anthropocene will doom biodiversity. “We need to meet proponents on the battlefield,” E. O. Wilson told me over dinner recently. Rather than the “cheery” Anthropocene, he prefers to call Earth’s new era of history the Eremocene: the Age of Loneliness. Elsewhere, Tim Caro and colleagues have warned that the concept of pervasive human-caused change may “cultivate hopelessness” and may even facilitate accelerated changes in land use motivated by profit. The controversy is one of adjectives. Scientists agree that humans have never been so populous. They agree that wilderness protection cannot be the only conservation strategy. But they disagree over whether scientists should describe humans as threats or as saviors.

Despite this new dialogue, the footprint metaphor remains a popular one. As one elementary school principal argued in The Christian Science Monitor, “A ‘footprint’ is a good metaphor for our individual impact on the social or natural environment. It’s personal, tactile, organic, and immediately comprehensible. It’s elementary. We’re bipeds; we all walk and leave tracks.” In a New York Times op-ed, Verlyn Klinkenborg wrote, “You feel as though you’re reducing global warming by saying it.”

But humans have been altering the Earth for millennia, and not only for the worse. We know from the management of invasive species and fire regimes that ecosystems can benefit from human action. Some species, like the California condor, avoid extinction only through human intervention.

So what if we move up on the human body to consider hands? A handprint, as opposed to a footprint, is deliberate, skilled, and artful. It evokes human agency and the human ability to shape the world by choosing among many possible natures. A handprint suggests stewardship. Handprints allow us to ask: What is the place of creativity in conservation? How can human existence lead to good?

Importantly, handprints remind us of equity and of power. Yes, we must consume resources to live. But as those who developed the footprint metaphor have pointed out, we do not consume equally. According to the Footprint Network calculator, it would require 3.6 Earths for the entire human population to live a lifestyle similar to my own.

It is with our hands that we take from others. And it is with our hands that we give to them. It is with our hands that we plant a seedling, carry a re-usable bag, and photograph a snow goose. Conservationists who characterize humans as uniformly destructive are as mistaken as those who characterize them as uniformly constructive. Both sides are missing the point that environmental governance – and all the human activity that comes with it – is immensely complex. Human hands speak, read, and write. They convey to us the texture of the world.

 

 

Laura Jane Martin is a poet, essayist, and NSF graduate fellow at Cornell University, where she studies the ecology and evolution of wetland plants. She has a BS in Biophysics from Brown University. This article originally appeared on Scientific American, and is reprinted with permission. 

 

Photo Credit: Wordpress User Global Bhasin


Comments

  • I feel this article artfully misses the core point of the footprint metaphor.  The environmental, or carbon footprint concept tries to create metrics by which we can compare human impacts against the ecological services that nature offers.  Water for instance, and its place in the water cycle, is a worthwhile and simple resource to look at.  As the Earth Institute has documented, aquifers all over the world are being drained to irrigate cropland.  This illustrates the application of water footprint to the food supply for billions of people.  The picture is not pretty, and dismissing the footprint metaphor in spite of its truthful and effective usefulness in illustrating human overshoot is also not pretty.  If you want to develop a metric (system of measurement) that would point out the degree to which certain human technologies and production methods show “handprint awareness,” that might be useful, but for now it appears clear that humans, or the humans who control the ways our species interacts with the Earth, clearly merit the surveillance that the footprint metaphor provides.

    By John Breitbart on 2014 04 15

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  • Interesting article. The problems with the “ecologic footprint” idea, however, extend well beyond the metaphor employed. Consider, for example, the list of countries by their so-called footprints: (http://en.wikipedia.org/wiki/List_of_countries_by_ecological_footprint).

    This entire scheme is concerned only with the resources used by people. Other creatures, unless they are consumed, are of no account. A country could suffer an eco-catastrophe, seeing the extermination of all its large mammals and birds, and it would not register on the index. Wholesale deforestation, swamp drainage, and other forms of habitat destruction are hardly noted. The model is also static. The fact that the populations of Yemen and Pakistan will probably double within a half century, while that of Japan will likely decline, does not figure, nor does the break-neck industrialization of China.

    The failure of the ecological footprint as a proxy for sustainability, or for any other form of ecological well-being, is glaringly obvious on the map. Could anyone actually contend that Afghanistan, Pakistan, Yemen, and the DR Congo are more sustainable than Norway, Sweden, or Finland? Are we really expected to believe that the poorest societies of tropical Africa and South Asia offer models of living within environmental limits? Yemen, its water and oil near exhaustion and its society near detonation, admirably avoids consumption of just about everything but the narcotic qat and hence has a small footprint, whereas Denmark, with the fourth largest per capita footprint in the world, is a resource-sucking burden on the Earth? Bizarre though it might seem, this is what a literal reading of the ecological footprint map tells us.

    (for a more complete explanation, see: http://www.geocurrents.info/economic-geography/the-misleading-ecological-footprint-model#ixzz2z6Son4dy

    By Martin W. Lewis on 2014 04 16

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