Nachruf Werner Siegrist.

The article reports on the advantages of cold production compared to traditional hot production of products. Cold production can reduce energy costs, reduce CO2 emissions, and meet consumer demands. In addition, the possibility of CO2 recycling is demonstrated through an innovative biotechnological process, in which CO2 from the air can be captured and converted into valuable products. This technology enables sustainable use of CO2 and opens up new perspectives for a resource-efficient economy. The article also includes an obituary for Werner Siegrist, who was a loyal supporter of SEPAWA Switzerland and actively involved in the association. [Extracted from the article]