appel gratuit

How many tonnes of CO2 do you emit each year?

Discover the impact and amount of carbon to offset in less than 5".

Earth Overshoot Day 2021 Calculator: What is Earth Overshoot Day?

earth overshoot day

July 29: This is the day in 2021 when humanity had consumed all the renewable resources that the planet can renew in a single year, also known as Earth Overshoot Day. How is Earth Overshoot Day calculated and why is it different for each country? Let's take a look at this fateful day and explore the solutions to move the date!


I STAND UP FOR REAL CLIMATE ACTION, I OFFSET MY CO2 EMISSIONS!Global warming is everyone's business! To offset your CO2 emissions and participate in the energy transition, call Selectra for free.
020 4525 0971


What is Earth Overshoot Day and how does it affect us?

Each year's Earth Overshoot Day marks the calendar date when humanity has used up all the biological resources that the Earth can renew during the entire year. The faster humanity uses up these resources the sooner in the calendar year Earth Overshoot Day is, which includes engaging in:

overshoot day

From the 1970s to 2019, the date of the Earth Overshoot Day has been steadily increasing. In 1970, it fell on December 30. In 1996 it was three months earlier on September 30, and in 2020 it was four months earlier on August 22.

In 2021, the Earth Overshoot Day fell on July 26. From that date onwards, humanity was living beyond the planet's capacity and entering the last four months of 2021 in a resource deficit.

ource: Earth Overshoot Day

When did Earth Overshoot Day occur in 2020 and why is it getting earlier each year?

In 2020, due to the COVID-19 pandemic, the date of Earth Overshoot Day was moved three weeks later than the previous year. This is due to the national lockdowns and the exceptional slowdown of the current economic model, in particular due to reduced CO2 emissions and less deforestation around the world.

However, this downward trend is only temporary. If the economy picks up as before, the Earth Overshoot Day will continue to advance a little further each year. The economic stimulus packages being prepared around the world are an opportunity for governments to change the current system and move towards a circular economy.

How is Earth Overshoot Day calculated?

calculator

Each year, the NGO Global Footprint Network calculates the Earth Overshoot Day based on 3 million statistical data from 200 countries.

The Earth Overshoot Day is calculated by dividing the planet's biocapacity (in global hectares) by humanity's ecological footprint (in global hectares) and multiplying by the number of days in a year, which is 365.

How many Earths do we need?

If we take Earth Overshoot Day for 2021, July 29, it would take 1.7 planet Earths to meet human demand and avoid running a deficit on our ecological resources for the year.

Visit the Global Footprint Network's ecological footprint calculator

What is our ecological footprint?Our global ecological footprint is the annual consumption of ecological resources by humans.

Earth Overshoot Day 2021 by country

Every country has a different Overshoot Day, because not all countries have the same biocapacity or ecological footprint. If a country's demand for ecological resources exceeds its supply of biocapacity, the country has an ecological deficit and an earlier Overshoot Day.

According to Global Footprint data, the country with the earliest Overshoot Day in 2021 is Qatar, which occurred on February 9, as opposed to São Tomé and Príncipe, which has the latest date, falling on December 27.

The 10 countries with the earliest Overshoot Days in 2021
Country Overshoot Day
Qatar February 9, 2021
Luxembourg February 15, 2021
United Arab Emirates March 7, 2021
Bahrain March 9, 2021
Trinidad and Tobago March 12, 2021
Bermuda March 14, 2021
Canada March 14, 2021
United States March 14, 2021
Kuwait March 14, 2021
Mongolia March 14, 2021

Source: Global Footprint Network

The 10 countries with the latest Overshoot Day in 2021
Country Overshoot Day
São Tomé and Príncipe December 27, 2021
Indonesia December 18, 2021
Chad December 16, 2021
Guinea December 14, 2021
Myanmar December 8, 2021
Ecuador December 7, 2021
Cabo Verde December 6, 2021
Nicaragua December 2, 2021
Dominican Republic November 29, 2021
Morocco November 26, 2021

Source: Global Footprint Network

Overshoot Day in the UK

The UK’s 2021 Overshoot Day took place on May 19. If all of humanity adopted a lifestyle similar to that of the average British person, it would almost take 3 planets to support them.

free call

How many tonnes of CO2 do you emit each year?

Discover the impact and amount of carbon to offset in less than 5".

How do I reduce my ecological footprint?

ecological footprint

There are many ways, big and small, we can all work to postpone each annual Earth Overshoot Day.

4 ways to postpone the deadline according to the WWF:

  1. Reforesting 350 million hectares of forest could postpone the deadline by 8 days;
  2. Reducing global meat consumption by half would postpone the deadline by 17 days;
  3. Dividing humanity's carbon footprint in half would postpone the deadline by 93 days, or about three months;
  4. Reducing global food waste by 50% would delay the deadline by 13 days.

On a personal level, here are some easy habits to adopt in your daily life:

Have a look at our other practical guides on environmental protection and the fight against global warming!

Updated on