fuels & sustainability
Hydrogen has some pros & cons as a fuel. It has a very high BTU/lb content, and zero CO2 emissions.
But hydrogen must be manufactured - you can't just drill for it. The emissions resulting from the manufacturing process must be considered.
And even in a supercooled liquid state, its density is very low, meaning HUGE tank size.
Methane has some of these advantages, and some of these disadvantages, and may turn out to be more attractive than H2.