The upper continental crust of the Earth weighs about 7*10^21 kg. 80 billion tonnes is 8*10^13 kg. So we’re consuming ~0.000001% of the planet under our feet annually. That’s… not scary at all.
ui.adsabs.harvard.edu/abs/2007AGUFM.…
amazon.com/More-Less-Surp…
amazon.com/More-Less-Surp…