Interesting about Your great uncle.  I am not surprised They jumped in and took over.

The only issue with hydrogen is its explosive element.  Safety becomes a problem.

With electrogravitics, there is no explosive aspect.  And it runs cool - things cool a bit, rather than heating - so the bogus "global warming" hype would not fly...  LOL!

Anyway, indeed those moneyed psychopaths in control on Our planet (by virtue of money) surely do hide anything that threatens Their profit/control.
 
Beneficial Technologies Stifled for Profit and Control  (article):  @amaterasusolar/beneficial-technologies-stifled-for-profit-and-control