Earth Overshoot Day 2012

Earth Overshoot Day 2012 (22.08.2012)

Der "Earth Overshoot Day" fällt dieses Jahr auf den 22. August.

In 2010 war er am 21. August, und in 2009 am 25. September.



In 8 Months, Humanity Exhausted Earth's Budget for the Year

Today, August 22, is Earth Overshoot Day, marking the date when humanity has exhausted nature’s budget for the year. We are now operating in overdraft. For the rest of the year, we will maintain our ecological deficit by drawing down local resource stocks and accumulating carbon dioxide in the atmosphere.

Just as a bank statement tracks income against expenditures, Global Footprint Network measures humanity’s demand for and supply of natural resources and ecological services. And the data is sobering. Global Footprint Network estimates that in approximately 8 months, we demanded more renewable resources and C0 2 sequestration than what the planet can provide for an entire year.

In 1992, Earth Overshoot Day—the approximate date our resource consumption for a given year exceeds the planet’s ability to replenish—fell on October 21. In 2002, Overshoot Day was on October 3. Given current trends in consumption, one thing is clear: Earth Overshoot Day tends to arrive a few days earlier each year.

Earth Overshoot Day, a concept originally developed by Global Footprint Network partner and U.K. think tank new economics foundation, is the annual marker of when we begin living beyond our means in a given year. While only a rough estimate of time and resource trends, Earth Overshoot Day is as close as science can be to measuring the gap between our demand for ecological resources and services, and how much Earth can provide.

 



What is Earth Overshoot Day?

 

Every year, Global Footprint Network calculates nature's supply in the form of biocapacity, the amount of resources the planet generates, and compares that to human demand: the amount it takes to produce all the living resources we consume and absorb our carbon dioxide emissions. Earth Overshoot Day, a concept devised by U.K.-based new economics foundation, marks the day when demand on ecological services begins to exceed the renewable supply.

 



Humanity's Consumption of Resources in 2012



The Cost of Ecological Overspending

  Number_of_Planets_2012_final_thumb

Throughout most of history, humanity has used nature’s resources to build cities and roads, to provide food and create products, and to absorb our carbon dioxide at a rate that was well within Earth’s budget. But in the mid-1970’s, we crossed a critical threshold: Human consumption began outstripping what the planet could reproduce.

According to Global Footprint Network’s calculations, our demand for renewable ecological resources and the services they provide is now equivalent to more than 1.5 Earths. The data shows us on track to require the resources of two planets well before mid-century.

The fact that we are using, or “spending,” our natural capital faster than it can replenish is similar to having expenditures that continuously exceed income. In planetary terms, the costs of our ecological overspending are becoming more evident by the day. Climate change—a result of greenhouse gases being emitted faster than they can be absorbed by forests and oceans—is the most obvious and arguably pressing result. But there are others—shrinking forests, species loss, fisheries collapse, higher commodity prices and civil unrest, to name a few. The environmental and financial crises we are experiencing are symptoms of looming catastrophe. Humanity is simply using more than what the planet can provide.

Earth Overshoot Day is an estimate, not an exact date. It’s not possible to determine with 100 percent accuracy the day we bust our ecological budget. Adjustments of the date that we go into overshoot are due to revised calculations, not ecological advances on the part of humanity. The when is less important than the what.

 



How is Earth Overshoot Day Calculated?

 

Put simply, Earth Overshoot Day shows the day on which our total Ecological Footprint (measured in global hectares) is equal to the biocapacity (also measured in global hectares) that nature can regenerate in that year. For the rest of the year, we are accumulating debt by depleting our natural capital and letting waste accumulate.

[ world biocapacity / world Ecological Footprint ] x 365 = Earth Overshoot Day Day

The day of the year on which humanity enters into overshoot and begins adding to our ecological debt is calculated by calculating the ratio of global available biocapacity to global Ecological Footprint and multiplying by 365. From this, we find the number of days of demand that the biosphere could supply, and the number of days we operate in overshoot

 

Quelle : externer Link Global Footprint Network

Weitere Informationen in deutsch finden Sie hier : externer Link Global Footprint Network