Originally Posted by
A Squared
While nominally true, it is misleading at best. There is a lot of Hydrogen on the planet. Most of it exists as part of a water molecule. Most folks understand that water has exactly zero value as a fuel. To liberate the hydrogen from the water so that it can be used as fuel requires the input of energy, more to the point it requires the input of more energy than can be recovered by burning (or otherwise utilizing) that fuel. In other words, a net loss of energy. When someone says, in the context of fuel; "Hydrogen is one of the most abundant elements in the universe" they either don't understand chemistry well enough to understand that the statement is pretty much meaningless, or they do, and are being intentionally deceitful.
Mere details. Don't use facts to destroy the dream.