Researchers at the Paul Scherrer Institute PSI have conducted a study to determine the most cost-effective regions for hydrogen production as part of a transition towards an economy based on this alternative energy carrier. The study, published in Nature Communications, highlights that solely replacing fossil fuels with electricity and hydrogen will not completely eliminate greenhouse gas emissions. The electrification of various sectors combined with renewable energy sources like hydroelectric, wind, and solar power is crucial for achieving Switzerland's goal of becoming climate-neutral by 2050. The researchers, under the leadership of Tom Terlouw and Christian Bauer, analyzed different scenarios for hydrogen demand in 2050, emphasizing the importance of a shift towards sustainable energy practices. They identified Canada as a promising region for hydrogen production due to its abundant wind resources and open spaces. However, challenges exist in densely populated areas like Switzerland and Germany, where suitable land for wind turbines is scarce. The study also addresses environmental implications of a hydrogen economy, discussing the need for global trade and energy-efficient transportation methods. Overall, the research underscores the significance of international collaboration and energy efficiency in realizing a sustainable hydrogen economy.