Comment Re:Helium can be re-used? (Score 4, Informative) 125
It can be. It's just going to cost money.
Purifying Helium is simple in principle: Just make it VERY cold. Every other element or molecule will turn to liquid or solid and can be drained or filtered away. What's left is pure helium. The problem is that it takes a significant amount of energy and technical effort to get the temperature down to where it needs to be. You have to get it down to between 4.2 and 20.28 Kelvin to really get it purified.
So it's all about cost. If you go to the effort and cost to collect all the helium gas used in the manufacturing and recycle it, then there's no shortage. But it costs money.
Also note that Helium is a renewable resource. It comes from the alpha decay of radioisotopes deep in the Earth's crust and collects in gas pockets that can be mined for it. So we're not doomed if a little of it is wasted: But we should be careful with it anyway.