The study by Helmholtz-Zentrum Hereon sheds light on the environmental implications of offshore hydrogen production utilizing wind energy, aiming to facilitate a sustainable and eco-friendly expansion in the North Sea. As part of the energy transition towards more sustainable practices, the focus has shifted towards green hydrogen as a key player in reducing dependency on fossil fuels. The German Offshore Wind Energy Act (WindSeeG) sets the stage for harnessing wind energy to produce hydrogen in offshore wind farms, with the goal of establishing 10 gigawatts capacity in the German Bight. One significant aspect highlighted in the study is the potential temperature impact of waste heat from hydrogen production. The research reveals that a 500-megawatt hydrogen plant can locally increase the water temperature by up to 2 degrees Celsius, leading to changes in sea stratification. The stratification of the ocean layers plays a crucial role in nutrient transport and marine productivity, posing a potential risk to the marine ecosystem. To address these concerns, the study proposes decentralized solutions for hydrogen production as a means to mitigate environmental impacts. By dispersing the production across multiple smaller electrolysers instead of centralizing it on a single platform, the researchers suggest a more sustainable approach to offshore hydrogen production. This decentralized model aims to reduce the localized effects on the sea and enhance the overall ecological sustainability of the production process. The recommendations put forth in the study offer a significant advancement in understanding the environmental implications of offshore hydrogen production and provide a roadmap for achieving eco-friendly expansion in the North Sea. By advocating for sustainable practices and emphasizing the importance of minimizing environmental impact, the research contributes to shaping a greener future in the realm of renewable energy and marine conservation.