For millennia, people relied on copper.

Our ancestors used it for water pipes, tanks, and supply systems. Not because it was cheap, but because it worked. Copper was durable, resilient, and possessed properties that we now try to replicate with great technological effort.

Then came the modern world.

Gradually, copper disappeared from our infrastructure. It was replaced by plastics, synthetic materials, and an ever-increasing use of chemicals. What was once supported by intelligent material selection is now often replaced by industrial processing.

This is particularly evident in swimming pools.

Copper pipes and copper-containing systems used to be widespread. Today, chlorine dominates. Millions of people regularly swim in water that has to be treated with chemicals to remain hygienic. At the same time, many are familiar with the side effects: burning eyes, irritated skin, respiratory problems, and the pungent odor that has long since been accepted as normal. But why do we accept something as progress when it produces side effects that previous generations didn’t experience in this form?

Of course, chlorine kills germs. But it also reacts with sweat, urine, and other substances in the water. This creates compounds that have been the subject of health debate for years. People who regularly use or work in swimming pools, in particular, repeatedly report problems with their skin and respiratory system.

The real question, however, is broader. Why have natural materials with special properties been systematically displaced?
Was it truly people’s health that drove this development?
Or was it primarily lower costs, easier installation, and higher profits?

Increasingly, the impression arises that many proven solutions of the past disappear as soon as they become less economically attractive than industrial alternatives. This applies to building materials, food, agriculture—and possibly also to our water systems.

Progress should mean creating better solutions.

Yet sometimes it seems as if we replace natural and proven systems with more technically complex processes, only to then combat the new problems with even more products and chemicals.

Perhaps we should therefore ask ourselves an uncomfortable question:
Did we really replace copper because it was inferior?
Or did we replace it because a world full of plastics, additives, and chemical processing became more economically attractive?

The past wasn’t perfect. But perhaps in some areas it was closer to nature—and therefore closer to what is ultimately good for humanity.

From Huter der Irminsul