The term “overshoot” represents the level by which human population overshoots the sustainable amount of resources on Earth. When viewed through an economic perspective, EOD represents the day in which humanity enters environmental deficit spending. EOD is calculated by dividing the world biocapacity (the amount of natural resources generated by Earth that year), by the world ecological footprint (humanity’s consumption of Earth’s natural resources for that year), and multiplying by 365, the number of days in a year.
Earth Overshoot Day is calculated by Global Footprint Network and is a campaign supported by dozens of other nonprofit organizations. Information about Global Footprint Network’s calculations and national Ecological Footprints are available online.
Earth Overshoot Day