But not out of the woods

The helium crisis seems to be mitigated for the time being, but while I was reading up on the story, I came across a lot of other stories about scarce resources and the genuine fears that we may run out of critical elements in a surprisingly short time. What will we do without these elements? Technology depends on them. And we thought a world without oil would be tough!

http://www.popularmechanics.com/technology/engineering/news/important-rare-earth-elements#slide-1

http://www.wired.com/wiredscience/2013/09/plutonium-238-problem/