- Date published:
11:20 am, August 17th, 2015 - 22 comments
Categories: capitalism, climate change, Globalisation, political alternatives, sustainability, water - Tags: earth overshoot day, ecological debt day, hard landing, sustainability
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. Earth Overshoot Day is hosted and calculated by Global Footprint Network, an international think tank that coordinates research, develops methodological standards and provides decision-makers with a menu of tools to help the human economy operate within Earth’s ecological limits.
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 365, the number of days in 2015: (Planet’s Biocapacity / Humanity’s Ecological Footprint) x 365 = Earth Overshoot Day
Or putting it more simply:
Global overshoot occurs when humanity’s annual demand for the goods and services that our land and seas can provide—fruits and vegetables, meat, fish, wood, cotton for clothing, and carbon dioxide absorption—exceeds what Earth’s ecosystems can renew in a year. Overshoot means we are drawing down the planet’s principal rather than living off its annual interest. This overshoot leads to a depletion of Earth’s life-supporting natural capital and a buildup of carbon dioxide in the atmosphere.
See further coverage in for example Time (How Humans Used Up a Year of Natural Resources In Under 9 Months) and National Geographic (We’ve Consumed More Than the Earth Can Produce This Year).
It should be obvious by now that this is a problem that our current political and economic systems cannot solve.