https://golfsustainable.com/wp-content/uploads/2022/06/siem-scaled.jpg9241336Petra Himmelhttps://golfsustainable.com/wp-content/uploads/2020/01/logo_GolfSustainable_web-300x77.pngPetra Himmel2022-06-01 08:50:382022-06-02 14:22:06Marcel Siem wants to become a CO₂-neutral golf pro
