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  • Writer's pictureNicolas

🌿 Is Hydrogen THE Solution for the Future of Mobility? 🌿

More than 100 scientists wrote an open letter in the context of the Paris 2024 - Comité d'organisation des Jeux Olympiques et Paralympiques de 2024 to say why it is not a good message to use hydrogen cars as a solution against climate change.

🌿 Is Hydrogen THE Solution for the Future of Mobility? 🌿

🔍 The answer isn't straightforward. Hydrogen could be part of a broader solution depending on how it’s produced and utilized:

📌 Usage and Production:

  • Hydrogen acts as an energy vector, transferring energy across space and time.

  • There are various methods to produce hydrogen, commonly classified by colors (e.g., green hydrogen, grey hydrogen).

Hydrogen Production Method
source: acciona energia
Different hydrogen production process by color
source: Energy Letter Review

🔋 Efficiency and Renewable Energy:

  • Green hydrogen (produced using renewable electricity) is the only immaculate method.

  • However, producing hydrogen via renewable electricity is less efficient compared to storing that electricity directly in vehicle batteries.

🚛 Application in Mobility:

  • Renewable hydrogen is a viable option for energy-intensive transportation like long-distance trucks, coaches, and public buses.

🧬 Key Points from the Scientists' Open Letter

📉 Hydrogen vs. Battery Electric Vehicles (BEVs):

  • Hydrogen vehicles, including the Toyota Mirai, are not aligned with net-zero goals.

  • BEVs are identified as the most effective way to decarbonize passenger transport.

💸 Cost and Infrastructure:

  • Green hydrogen vehicles need three times more renewable electricity than BEVs, making them more expensive and less efficient.

  • The high cost and limited infrastructure for hydrogen refuelling are significant barriers.

🌍 Environmental Impact:

  • Most hydrogen today is produced from fossil fuels, which emit substantial CO2.

  • Switching the official fleet of the 2024 Olympics from hydrogen vehicles to BEVs is recommended to better align with net-zero goals.

🚫 Failed Trials and Market Decline:

  • Hydrogen vehicle trials have failed in several countries due to cost and infrastructure issues.

  • BEVs are vastly more prevalent and practical for consumer use, with a growing support infrastructure.


Hydrogen can contribute to the future of mobility but isn't the sole solution. BEVs are currently more efficient and aligned with environmental goals. The future likely holds a mix of technologies, with hydrogen playing a specific role in energy-intensive applications.

Engibne efficiency by renewable fuel type
source: Transport&Environment


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