Since 1971, the Global Footprint Network has calculated “Earth Overshoot Day” to highlight the impacts and implications of human resource consumption. As stated on the event website, “Earth Overshoot Day marks the date when humanity’s demand for ecological resources and services in a given year exceeds what Earth can regenerate in that year. We maintain this deficit by liquidating stocks of ecological resources and accumulating waste, primarily carbon dioxide in the atmosphere.”
“To determine the date of Earth Overshoot Day for each year, Global Footprint Network calculates the number of days of that year that Earth’s biocapacity suffices to provide for humanity’s Ecological Footprint. The remainder of the year corresponds to global overshoot. Earth Overshoot Day is computed by dividing the planet’s biocapacity (the amount of ecological resources Earth is able to generate that year), by humanity’s Ecological Footprint (humanity’s demand for that year), and multiplying by the number of days in a year. This year, as we are in a leap year, it is 366 days:
(Earth’s Biocapacity / Humanity’s Ecological Footprint) x 366 = Earth Overshoot Day”
In 2024, Earth Overshoot Day falls on August 1st. Collectively, humanity would need 1.75 Earths to meet its resource demands.
The numbers get worse if you look at consumption at the country level. If everyone globally lived like the residents of the United States of America, Earth Overshoot Day would have occurred on March 14th this year, and humanity would need the equivalent of five Earths to match resource demands.
See https://overshoot.footprintnetwork.org/2024-calculation/ to learn more about how this year’s Earth Overshoot Day was calculated.
Clearly, none of this is sustainable. So what can we do to #MoveTheDate later in the year, so our demands better match the ability of Earth to regenerate ecological resources? The Global Footprint Network presents potential solutions to pursue individually and collectively as “The Power of Possibility” in five main categories:
- Cities: How we design and manage cities
- Energy: How we power ourselves
- Food: How we feed ourselves
- Population: How many of us are there
- Planet: How we help nature thrive
See https://overshoot.footprintnetwork.org/power-of-possibility/ to learn more about potential strategies in each of these categories in detail. For each strategy, the Earth Overshoot Day website explains how much implementation would shift the overshoot date and how the strategy is scalable. The website also provides classroom activities and a link to a personal environmental footprint calculator to help individuals understand their lifestyle impacts.
Dr. Mathis Wackernagel, who created the concept of the environmental footprint with Professor William E. Rees in the early 1990s, provides an online primer to understanding the implications of overshoot and how to respond. He states “Because the accumulated stock of nature is finite, overshoot will inevitably end as stock get depleted. The question, therefore, is not whether it will end, only how. It can end by design or by disaster – most likely it will be a combination of both.” Let’s work together to do our best to end overshoot by design.
