I'm only using hydrogen as an example because it fits so well.
To make serious inroads to wide acceptance and usage, make the smallest hydrogen fuel cell vehicles you possibly can. something aimed at being inexpensive and targeted at the warrior commuters who bike and use public transportation to get to work. Provide better parking rates for sfv's (small footprint vehicles)..
Provide recommended and safe routes...
A mere frame of nocomplexity...
Basic safety features.. low rolling resistance, effective... scalable in cost and complexity...
We have too much mindset on replacing the same sized vehicles with an army of sames sized vehicles, when in the end, we know we really need to rethink that as well.
put just a couple tiny refueling stations in a few bustling areas where it would be accepted and learn from there.. and grow as demand continues.
why do we want to spend a trillion to make the whole chicken or the whole egg?
along those lines,
most people will never afford a solar or wind system.
It's more of a situation where they don't realize they could afford these systems.
Or people push such lofty systems, that most just turn away.
make a kit available for a tiny cost that would include a solar panel, and maybe a 24" - 36" mast turbine... kit etc...
box it all up so you just plug and play..
built in high efficiency room lighting, LEDS of course
entertainment center (mp3 /radio /small led TV or new micro projector / DVD)
something that could run at night and by day to an extent.. nothing end all..
just great.. useful, and cheap ... something that we could use and learn from right in our home.. and grow from there..
next unit.. the PC
next unit available.. the refrigeration unit
and then... and then..
people would be putting them in garages and cabins and the home.
Give us all a little system here and a little system there, and before you know it, many of us will be turning off our electrical panels once and for all.
make it as easy as mounting a satellite dish and running a wire through the wall.
almost a fun and necessary product..
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keep the greed out and it would work fine
...just a thought.