[Self cleaning of natural waters].
The planting of the waters left the question open as to whether the necessary expenditure of work is really worthwhile and should be encouraged. The investigations reported here with higher and particularly emersed plants, show what an astonishing influence the higher plants exert on organic and inorganic matter, on pH regulation, destruction of pathogenic bacteria, worms' eggs, and viruses, and also how they influence the waters and waste waters.
[Self cleaning of natural waters]. The planting of the waters left the question open as to whether the necessary expenditure of work is really worthwhile and should be encouraged. The investigations reported here with higher and particularly emersed plants, show what an astonishing influence the higher plants exert on organic and inorganic matter, on pH regulation, destruction of pathogenic bacteria, worms' eggs, and viruses, and also how they influence the waters and waste waters.