Why would it be profitable to reopen copper mines to mine ore that's just 0.5 percent copper?

A low grade copper mine might be re-opened if: 1) If copper prices go up 2) It's a massive deposit, easily extracted, close to rail lines or shipping 3) If it's found with something else, like silver or gold, that boosts the value 4) During war, or major copper shortage 5) If cheap new refining methods are discovered.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.