One Important thing I did not mention in the comment about gaseous fuels is the phenomenal reduction in wear of an internal combustion engines. In the days before computer management of fuel injection and ignition systems and the better metallurgy and lubrication (pre 1960s) it was unusual for automobile engine to go 100.000 miles without an overhaul (usually major), but the propane powered commercial vehicles were racking up 300,000 to 400,000 miles consistently. But gasoline was cheaper that propane then (at least in California). The saving to the commercial operators was the reduction in engine maintenance.

This reduction in wear, I believe, was due to the gaseous nature of the fuel, and during cold starts would not wash the lubrication from the cylinder walls and dilute the lubrication oil with unburned fuel. Today with improved computer controlled engine ignition and fuel delivery systems, better lubrication and metallurgy, the difference may not be as great (I an driving a 1991 Subaru with over 300,000 miles on it), but I bet it is still better.

By the way, how do you “Ride the Waves) on a board or boat or kite? My joy still is sailing,

“The reason: Hydrogen engines can run on fuel derived from natural gas more cheaply than other currently available feedstocks.”

“Another irony: like crude oil, a small number of countries–Russia, Iran, Qatar and Saudi Arabia–control the vast majority of the world’s natural gas reserves. Many have begun referring to this possible gas cartel as OGEC. In other words, here we go again.”