Hydrogen, often dubbed the 'Swiss Army Knife of energy carriers,' holds the key to transforming our energy system towards sustainability. While hydrogen is not an energy source itself but an energy carrier, its potential as a clean and green solution is gaining attention. Despite the challenges posed by the current predominance of 'dirty' hydrogen sourced from fossil fuels, there's a growing shift towards clean hydrogen production. This transition involves overcoming various hurdles such as storage issues, safety concerns, and economic viability. Green hydrogen is seen as a crucial player in achieving a net-zero-emissions energy system, with the Swiss Federal Office of Energy projecting its significant role in Switzerland's energy mix by 2050. The journey towards green hydrogen involves utilizing renewable electricity for hydrogen production through processes like electrolysis of water. This clean hydrogen can then be employed in various applications, from powering vehicles to storing renewable energy. The potential for hydrogen to be a game-changer in reducing global CO2 emissions is propelling its resurgence in the energy landscape. Research and innovations are driving the market adoption of green hydrogen, particularly in transportation and electricity production sectors. Breakthroughs in technology, cost reduction in renewable electricity, and advancements in fuel cells and storage systems are paving the way for a more widespread use of hydrogen-powered vehicles. However, challenges like the lack of infrastructure, such as hydrogen refueling stations, hinder the rapid adoption of this technology. Despite the hurdles, the promising characteristics of hydrogen, such as its ability to produce only water when combusted and its versatility in applications like fueling ships and aviation, make it a valuable asset for a sustainable energy future. As efforts continue to enhance the efficiency and safety of hydrogen production and utilization, green hydrogen stands as a beacon of hope for achieving a cleaner and greener energy mix.