Nature can work as a brilliant water cleaning system
Frits Ahlefeldt, Hiking.org
In the last ten years there has been a new trend, using nature as a purification system, cleaning polluted sewage, run of from streets and roads – even a new kind of natural swimming pools are using nature’s own purification systems. It’s not 100% clean, as when filling water with chlorine and other poisons. But using natural organic life-based cleaning techniques is a lot more in balance with nature, and it won’t destroy life and might even one day bring us forward, to a place where we can drink and swim in the water from our natural sources again, without needing to poison it first.
Frits Ahlefeldt: Hiking, thoughts & watercolors 