"second most common element in the known universe" Yeah, but its impossible to harvest He in space (Collect the sun's plasma? Land on Mars, and drill there? A big He collecting sail?)
That's how He is made < natural decay of alpha emitters getting trapped in NG wells. It works on a geological scale, but not in industrial scales < the decay rate is too low.
"second most common element in the known universe" Yeah, but its impossible to harvest He in space (Collect the sun's plasma? Land on Mars, and drill there? A big He collecting sail?)
That's how He is made < natural decay of alpha emitters getting trapped in NG wells. It works on a geological scale, but not in industrial scales < the decay rate is too low.