The ecological footprint is a measure of human demand on the Earth's ecosystems. It is a standardized measure of demand for natural capital that may be contrasted with the planet's ecological capacity to regenerate. It represents the amount of biologically productive land and sea area necessary to supply the resources a human population consumes, and to assimilate associated waste. Using this assessment, it is possible to estimate how much of the Earth (or how many planet Earths) it would take to support humanity if everybody followed a given lifestyle. For 2007, humanity's total ecological footprint was estimated at 1.5 planet Earths; that is, humanity uses ecological services 1.5 times as quickly as Earth can renew them. Every year, this number is recalculated to incorporate the three-year lag due to the time it takes for the UN to collect and publish statistics and relevant research.
Although the term ecological footprint is widely used and well known, the methods used to calculate it vary greatly. However, standards are now emerging to make results more comparable and consistent.
Read more about Ecological Footprint: Overview, Methodology, Studies in The United Kingdom, Discussion, By Country, Implications
Famous quotes containing the words ecological and/or footprint:
“It seems to me that there must be an ecological limit to the number of paper pushers the earth can sustain, and that human civilization will collapse when the number of, say, tax lawyers exceeds the world’s total population of farmers, weavers, fisherpersons, and pediatric nurses.”
—Barbara Ehrenreich (b. 1941)
“There is on the earth no institution which Friendship has established; it is not taught by any religion; no scripture contains its maxims. It has no temple, nor even a solitary column. There goes a rumor that the earth is inhabited, but the shipwrecked mariner has not seen a footprint on the shore. The hunter has found only fragments of pottery and the monuments of inhabitants.”
—Henry David Thoreau (1817–1862)