accet. isn't one of the cleanest burning fuel gasses, and just as soon as I say it probably won't work, somebody will come along and say "Oh ya we use accet. all the time to weld alum." but i've never seen alum welded with accet.
i've never heard of using hydrogen for a fuel gas.
propane does burn clean and i've seen it used in welding irrigation pipe in the field.
The basic question of politics is "Who does what to Whom?". -Vlademir Lenin.
"Politicians are always interested in people.
Not that this is always a virtue.
Fleas are interested in dogs." -P.J.O'Rourke