Do you actually know what is going on under your feet? The thin layer of humus in the soil provides everyone in the world with food, clean drinking water and clean air. And it can save the climate. After all, healthy soils are the largest reservoir for greenhouse gases after the oceans and make a significant contribution to reducing CO2. But it takes our planet more than 2,000 years to form ten centimetres of fertile soil. And yet we use our soils as if they were inexhaustible. This means that our food source is endangered - by us humans! What does this mean for the future? How must agriculture and society change so that we can pass on a living world with living soils to our children?