Each year 1,400 new synthetic turfs ‘surface’ in Europe. At the core of this artificial lawn are black granules made of crushed car tires. They infiltrate everything: shoes, clothes or hair. These granules contain toxic substances or even known carcinogens. What effects do they have on the health of those who play on them? What are the effects on the environment? This documentary investigated the synthetic turf market for one year and the pressures of the industry. And there are controversial conclusions to be drawn as regards the widespread use of artificial lawn and the risks involved.