- What is green hydrogen and why does it matter now?
Unlike “gray” hydrogen (produced from natural gas, which emits CO2), green hydrogen is obtained without harmful emissions. The process uses electricity from wind or solar sources to separate water into hydrogen and oxygen. According to the International Energy Agency (IEA), this process is essential for achieving emission neutrality by 2050.
Until recently, the high cost of electrolyzers was the main obstacle. However, technological progress and massive subsidies have led to a decrease in production costs by more than 40% over the last five years, making green hydrogen competitive with traditional fuels in certain regions.
- Impact on heavy industry: Green steel
The steel industry is responsible for approximately 7-9% of global carbon dioxide emissions. The traditional method uses coal (coke) to extract iron from ore. Green hydrogen allows for the replacement of coal, resulting in water instead of CO2).
Companies like SSAB in Sweden have already demonstrated that “fossil-free” steel production is possible and viable on an industrial scale.
This transformation is not only ecological but also economic. The European Union has launched the “European Hydrogen Bank” to finance projects that accelerate this transition in member states.
III. Revolution in transportation: Beyond electric cars
While small cars rely on lithium batteries, heavy-duty trucks, cargo ships, and airplanes need an energy density that batteries cannot yet provide. Liquid hydrogen or ammonia produced from green hydrogen are the solutions currently being tested by companies like Airbus, which aims to launch the first zero-emission commercial aircraft by 2035.
In the maritime sector, container transport is responsible for a massive portion of global pollution. The giant Maersk has already invested in ships that run on green methanol derived from hydrogen, marking the beginning of the end for fuel oil in the oceans.
- The geopolitics of energy: New powers on the map
The transition to hydrogen will rewrite the map of global influence. Countries with vast solar and wind resources, such as Chile, Australia, or Morocco, are preparing to become the major energy exporters of the future. Chile, for example, has the potential to produce the cheapest green hydrogen on the planet due to the constant winds in Patagonia and the solar radiation in the Atacama Desert.
Australia has launched giant projects, such as the “Western Green Energy Hub“, which will cover an area larger than many European countries, dedicated exclusively to hydrogen production for export to Japan and South Korea.
- Technical challenges: Storage and distribution
Hydrogen is the smallest molecule in the universe, which makes it extremely difficult to store. It leaks easily and can embrittle existing steel pipes. The solution that researchers are exploring is the transformation of existing natural gas networks to transport hydrogen blends or the use of liquid organic hydrogen carriers (LOHC).
Safety is another major public concern. Although hydrogen is flammable, modern monitoring technologies and advanced sensors make its use as safe as that of methane gas or gasoline, according to industrial safety studies.
- Economic future: jobs and investment
It is estimated that the hydrogen economy will create over 30 million jobs globally by 2050. The total investments required are in the trillions of dollars, but the benefits in reducing the costs caused by climate disasters far outweigh these sums.
Green hydrogen is no longer a simple theoretical promise. It is an industrial reality taking shape in steel mills, ports, and research centers around the world. Although the road to a fully hydrogen-based economy is paved with logistical challenges, the speed of innovation suggests that we are much closer to the “hydrogen era” than we would have thought a decade ago. This is probably our last chance to reconcile industrial progress with the survival of the planetary ecosystem.
Article written by Denisa Dobrin, school student.