World Athletics revealed the details to celebrate Earth Day, which falls on April 22 every year. 

The 2023 World Athletics Championships, scheduled for August 19 to 27, does not require any permanent construction as all facilities have been planned and approved independent of the bid. 

The site of the stadium, on the river bank on the southern border of Budapest, is currently a disused waste ground.

It will be regenerated and will become a public park, the South-Pest Sports and Leisure Park, with 15 acres of green space.

There is set to be temporary seating in the stadium, giving it a capacity of 40,000 during the World Championships and 15,000 after. 

Once the temporary upper tier is removed, the stadium would be left with a circular plateau, which can be filled with public leisure areas.

Spectators will be able to access the venue by public transport or by walking. 

"This area, the South-Pest Sports and Leisure Park, will not only be used by elite athletes, it will be used by families, schools, employees of the area and a lot of Budapest,” said Budapest 2023 chief executive Marton Gyulai. 

"For months, we have been working with architects to develop the idea of having as many multifunctional and event spaces in the stadium as possible, which can be utilised in a variety of ways after the event.

"At the same time, the stadium and park would be not only an event venue but also a community space. 

"The area, both inside and outside the stadium, will be used by locals who want to run in the good air, jog or just walk on the banks of the Danube."

Budapest, like all host cities of future World Athletics Series events, will also join World Athletics’ air quality project.

The governing body released its 10-year sustainability strategy at the start of the month, setting a target of becoming carbon neutral by 2030.

World Athletics has also pledged to reduce its carbon output by ten per cent each year and has vowed to switch to 100 per cent renewable energy at its Monaco headquarters in 2020.

A sustainable procurement code and travel policy is set to be introduced, alongside best practice guides for its 214 Member Federations and its event organisers.