The main reason is the high cost of production
No catalyst to produce hydrogen from coal or water

Hydrogen would be a good substitute for gasoline
Advantages and Disadvantages of Hydrogen Energy
Why are we still not using hydrogen engines?
Accuracy 20
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In 2033
The main reason is the political disagreement between members of the European Union

As the European Union is part of NATO, and the U.S. is planning to start a war against Russia and China. Many in the European Union will not like this and will decide to break the alliance
EU crisis: Majority of Europeans believed bloc will fall apart within 20 years
Europe Will Disappear: Prophets Told How It Will Happen
Accuracy 20
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In 2060
There will be a war and they will drop an atomic bomb on the navy. After the loss of part of the fleet, a peace agreement will be signed

China intends to overtake the United States on all measures in 2035. The U.S. has become a brake on its progress. By 2060, China will still overtake the United States on all indicators. If it is not stopped, the U.S. will lose the lead. Therefore, the U.S. will pit China and Russia against each other.
Keeping up with China: the US is looking for money for the fleet
Accuracy 10
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Clean water
There is currently a shortage of fresh water in some regions, and the problem will only worsen in the future

Just as acute is the problem of water pollution
42 Upsetting Water Pollution Statistics (2023 UPDATE)
More expensive than oil: how water scarcity will become one of the main challenges of the XXI century
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