New, energy-efficient technologies for sustainable production Before  After Company name: Mertens Wiesbrock GbR Company description: The Mertens Wiesbrock GbR is a small, specialized organic vegetable market garden. It adheres to the strict guidelines of the Bioland Association for organic cultivation. Despite its small size, the nursery is characterized by remarkable diversity: it cultivates over 40 different vegetable varieties. This diversity …