On the farm of the Röösli family, around 80% of the 35 cows use the toilet. With its help, approximately 200 liters of urine are collected daily.
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In April 2025, the first innovative cow toilet began operating in Switzerland. It is being tested on a family dairy farm as part of a project aimed at reducing harmful ammonia emissions in the country, reports the Swiss agricultural portal Lid. Paradise Garden for Cows Around 90% of ammonia emissions come from agriculture, ecologists say. Ammonia is mainly produced in animal husbandry through contact with urine and feces. The gas evaporates, enters the atmosphere, and acts as an uncontrolled fertilizer – but in inappropriate places. This is particularly dangerous for sensitive ecosystems such as meadows, marshes, and species-rich forests, which are subject to long-term destruction by nitrogen. It can be smelled but not seen. It is in the air, and this is a problem for both agriculture and the environment, says Lucerne canton council member Laura Spring during a visit to the Rösli family farm. According to official data, "ammonia pressure" is highest in this canton. One of the ...