[tyu100]

There is tons of cobalt in the world (pun intended). In Canada alone there are at least a dozen junior miners with prospects looking for capital (there's even a town called Cobalt in Ontario from a previous mining era). It's just not economic to mine at current prices. This is a non-issue and I'm disappointed Nature published this dumb article.

[l_camacho84]

The question is not how many resources we have, the question is how hard they are to extract. The more resources we extract from earth the more difficult they become to extract, that is, we need to apply more resources/pollution/energy/technology to extract the same ton of cobalt that we used in the past. This turn this problem in an exponential one, I don’t know when we will need to face it but I understand the concern of Nature (pun intended).