The tiny plastic particles are so small that conventional sewage treatment plants cannot filter them out of the water. The small fibres are produced, for example, when synthetic clothing is washed. The plastic threads continue to break and rub off and enter the water cycle via the sewage system. Toothpaste, cosmetics or wall paint also contain tiny plastic particles that sooner or later end up in our drinking water.
The ever-growing mountains of rubbish are also a problem, because plastic does not decompose so easily. According to the ‘Initiative Mikroplastik’, it takes 450 years for a plastic bottle to decompose completely. But before that, the bottle is crushed by the weather into microscopically small pieces, which also get into our bodies via the drinking water.