Sustainable manufacturing, propulsion, power supply, and maintenance solutions are becoming increasingly important â€“ and the automotive sector is already implementing them for itself. Railway companies are increasingly rolling green alternatives out onto the rails. Aircraft manufacturers are already testing their first solutions. And now the issue is also playing an increasingly important role in the defense industry with its long development cycles. The public discourse around climate change mitigation has become inarguably louder over the past few years. An increasing number of companies are addressing the issue of sustainability, and not just to enhance their public image. The primary objective is to use existing resources as efficiently as possible and conserve them â€“ and thereby also create competitive advantages.