Unfortunately for them, as far as I know the only natural resource the world has run out of is guano.
From ZH:
Peak Gold? Goldman Calculates There Is Only 20 Years Of Gold Supply Left
Late last year, when looking at a Goldcorp slideshow, we noticed something surprising: the gold miner had forecast that 2015 would be the year when gold production would peak among the mining industry.
To be sure Goldcorp was really just pitching its own balance sheet, and was more focused on its far more levered gold-mining competitors going out of business...
... and hence facilitating "peak production" this year as one after another producer is forced to file for bankruptcy, than actually making a statement on how much gold remains to be mined in the ground. Because the last thing even the most healthy gold miner, with the lowest production cost wants, is to face a world in which their primary commodity is running out.
Which may just be this world.
According to a report issued by Goldman's Eugene King looking at commodity scarcity, the chart below "shows that there are only 20 years of known mineable reserves of gold and diamonds."...MORE