The purpose of the looking at the future...is to disturb the present!

Gaston Berger (1896-1960), francuski futurolog

The Purple Track at the 2024 Summer Olympic Games Has a Secret Ingredient

Recycled shells of mollusks native to the Mediterranean Sea were used to manufacture the synthetic floor of the athletics track, as part of the Games’ commitment to sustainability.
Link :
https://www.wired.com/story/paris-summer-olympics-2024-purple-track-athletics-mondo/