(Always earlier) Earth Overshoot Day

Earth Overshoot Day has moved from early October in 2000 to August 13th this year. Earth Overshoot Day marks the date when humanity’s annual demand on nature exceeds what Earth can regenerate in that year. In less than eight months, humanity has used up nature’s budget for the entire year, with carbon sequestration making up more than half of the demand on nature, according to data from Global Footprint Network, an international sustainability think tank with offices in North America, Europe and Asia. Global Footprint Network tracks humanity’s demand on the planet (Ecological Footprint) against nature’s ability to provide for this demand (biocapacity).

How many planets we need to support our lifestyle?“Humanity’s carbon footprint alone more than doubled since the early 1970s, which is when the world went into ecological overshoot. It remains the fastest growing component of the widening gap between the Ecological Footprint and the planet’s biocapacity,” said Mathis Wackernagel, president of Global Footprint Network and the co-creator of the Ecological Footprint resource accounting metric. “The global agreement to phase out fossil fuels that is being discussed around the world ahead of the Climate Summit in Paris would significantly help curb the Ecological Footprint’s consistent growth and eventually shrink the Footprint.”

The carbon footprint is inextricably linked to the other components of the Ecological Footprint — cropland, grazing land, forests and productive land built over with buildings and roads. All these demands compete for space. As more is being demanded for food and timber products, fewer productive areas are available to absorb carbon from fossil fuel. This means carbon emissions accumulate in the atmosphere rather than being fully absorbed.

The climate agreement expected at the United Nations Conference of Parties (COP) 21 this December will focus on maintaining global warming within the 2-degrees-Celsius range over pre-Industrial Revolution levels. This shared goal will require nations to implement policies to completely phase out fossil fuels by 2070, per the recommendations of the U.N.’s International Panel on Climate Change (IPCC), directly impacting the Ecological Footprints of nations.

If nothing changes we will have to use the resources equivalent to two planets by 2030, with Earth Overshoot Day moving up on the calendar to the end of June. This projection assumes that biocapacity, population growth and consumption trends remain on their current trajectories. However, it is not clear whether a sustained level of overuse is possible without significantly damaging long-term biocapacity, with consequent impacts on consumption and population growth.

“Sustainability requires that everyone live well, within the means of one planet. This can only be achieved by keeping our Ecological Footprint within our planet’s resource budget.” said Wackernagel. ONE

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