My opinion ... for long term hydro (I'm in canada eh), wind, solar make
sense (usually lotsa wind, solar, and water around boats by the way). But
for the short/near term, it's looking like mainly natural gas ... e.g bld
has some units selling in japan, fcel units here and there. All I know is,
somebody better start building that hydrogen infrastructure (and finish it)
while we still have the fossil fuels to do the work.

The sticky point with hydrogen is that it takes so much energy to
produce. Where are we going to get all this energy, which we're already
short of?

Iceland is blessed with practically unlimited geothermal energy. So they
can produce hydrogen for their own use as well as export.

Matt O.