Information:

Hundertwasser supported "Naturfreikauf" (liberating nature by buying it up), an initiative led by Bernd Lötsch, president of the planning committee for the Danube national park, and Hubert Weinzierl, president of BUND (German League for the Environment and Nature Conservation). It was the initiative's goal to buy up unique biotope islands and eco-cells along the Danube as the first building blocks for a Danube national park in Lower Austria, thereby preventing the construction of a water power plant, and saving the last natural river beds in Germany. Hundertwasser persuaded the Vöslauer company to make a substantial contribution to this initiative. As an acknowledgement of their donation, he designed and donated their "Sparkling water" label. Since the mineral water bottle with the Hundertwasser label was particularly successful, it remained on the market for more than ten years. Beginning in 1993 Hundertwasser donated his royalties to the Austrian WWF (World Wide Fund for Nature).