Any use of hydrogen that doesn't involve fossil fuels is considered to be environmentally friendly and is therefore a green technology. The story you posted isn't the first report of hydrogen being found underground in large enough supplies to provide a significant source of green energy as I noted in my original post. The underground reserve of hydrogen gas that's been found is 26 times the size of the remaining reserve of the planet killing fossil fuel If only a portion of this underground hydrogen gas reserve is accessed, it'll provide enough energy to power humanity for 200 years. That's a significant supply of hydrogen, Your reply also doesn't note that storage facilities and supply lines will have to be retrofitted to handle hydrogen because conventional storage tanks and supply lines aren't adequate.
BTW, there have been many leaks and explosions with gasoline over the years that people don't think about. Underground gasoline storage tanks at gas stations have been leaking gasoline into the water supply for years. The gas tank in the back of every fossil fuel powered car is an explosion waiting to happen.
I'm well aware of NASA's work with hydrogen. My engineer father's inspiration for deciding that hydrogen is the solution was the fact that that the space shuttle ran on liquid hydrogen and oxygen. NASA is currently looking for water on the Moon in order to extract the hydrogen and use it for fuel to be able to go to Mars and beyond.
No offense to your brother but an electrical engineer is not a mechanical engineer. It's the mechanical engineers that really understand how the various modes of transportation are constructed and what they'll need to be able to adapt to a world that no longer burns fossil fuel. Please don't think that you know more about this than my engineer father knew about it. This issue was part of my childhood.
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