The biggest problem with hydrogen fuel cell vehicles is that they tend to overheat and catch fire. Occasionally they would even explode. But, it was not an explosion like you see on TV.
We have all heard of an H-Bomb or Hydrogen bomb. When the hydrogen fuel cells would explode, even though it only happened occasionally, they would level and clear an area of up to 5 miles in radius.
Some consumers considered this to be excessively dangerous, and so sales fell off. Eventually production stopped.
240b is joking around (Él está tirando de nuestro pelo).
There have never been any incidents of these vehicles blowing up much less, "leveling a 5-mile radius". heh
Nor are they any more of a fire-hazard than any other motor vehicle which carries potentially-combustible fuel. There are currently three H-models available for sale on a limited basis.
The largest drawbacks are (1) scarcity and high cost of fuel for the cells (2) scarcity and high cost of fuel for the cells (3) scarcity and high cost of fuel for the cells.
As any sort of solution for mass transportation they are a dead end. Until a cost-effective environmentally-salable method for producing large amounts of hydrogen is created, they will continue to be little more than toys for ecopanoids just like electric cars.
