>I wonder what pressure we can use to for our local airlines to get on the list?

The real issue is setting up and affording the more boring stuff I'd imagine, infrastructure/training for fueling and maintenance, possibly being certified if they're not already. Those things are nice, but we don't choose fuel types because they're a bit quieter, we go with what's stable, available and cheap. If it provides multiple benefits along with better cost, I don't see why companies wouldn't switch eventually.