WARM UP
Take nothing but pictures, leave nothing but footprints...?
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Since the United Nations Conference on Environment and Development in 1992, population growth and increases in consumption in many parts of the world have added to humanity’s ecological burden on the planet without a corresponding increase in the Earth’s natural resources. The World Wildlife Fund’s Living Planet Report 2004 noted that humanity’s ecological footprint grew to exceed the Earth’s biological carrying capacity by 20%.1
Based on the relationship between humanity and the biosphere, an ecological footprint (EF) is a measurement of the land area required to sustain a population of any size. This methodology was first described in 1992 by Drs William Rees and Mathis Wackernagel at the University of British Columbia in Canada.2
Under prevailing technology, an EF measures the amount of arable land and aquatic resources that must be used to continuously sustain a population, based on its consumption levels at a given point in time. This measurement
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