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What is the estimated average ecological footprint of humanity in acres? 

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The conclusion of this paper is that the main value-added of Ecological Footprint Accounting is highlighting trade-offs between human activities by providing both a final aggregate indicator and an accounting framework that shed light on the relationships between many of the anthropogenic drivers that contribute to ecological overshoot.
We also conclude that the Ecological Footprint, by aggregating in a consistent way a variety of human impacts, it can effectively identify the scale of the human economy by comparison with the size of the biosphere.
The notion of a footprint floor has implications for setting community footprint targets and understanding the magnitude of change needed for significant ecological footprint reductions.
The ecological footprint is a useful indicator with which to quantify the pressures imposed by humans on natural resources and regional capacities for sustainable development.
It concludes that many crucial questions pertinent to building a sustainable society can be addressed by current ecological footprint research.
It offers planners, policy-makers, and community leaders an accessible, straight forward, and cost effective strategy for estimating the ecological footprint at the community and municipal level.
The ecological footprint provides an indirect basis for considering the long-term ecological risk and sustainability of human settlements, regions or, in this case, a continent.
We suggest that the majority of the criticism is derived from the misconception that the Ecological Footprint measures land “use,” which cannot exceed land availability.
The ecological footprint (EF) concept provides valuable insights into the human appropriation of resources relative to earth’s carrying capacity, and therefore it enables us to compare human demands with nature’s supply and provides an indicator of human ecological sustainability.
We conclude that the average ecological footprint intensity of countries have improved significantly in the given period.
Ecological Footprint Analysis of these real demands can give us some measure of the degree to which Earth's surface can sustainably support humanity's patterns of consumption as population grows and standards of living in developing countries rise.
This analysis provides evidence that the Ecological Footprint is a meaningful ecological indicator which can be compared to equivalent measures of the appropriation of ecosystem productive capacity and land use pressures.
Therefore, ecological footprint might be followed to understand, in an integrated manner, the environmental impacts of the humans’ activities on the biosphere and its composing ecosystems.
The input–output approach provides a consistent means of calculating an ecological footprint using data collected as part of the system of national accounts in most developed countries.
We believe this paper can be of high interest for both policy makers and researchers in the field of ecological indicators, as it brings clarity on most of the misconceptions and misunderstanding around Footprint indicators, their accounting frameworks, messages, and range of application.

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