The 'Hubbert's Peak' approach to oil reserves has fostered the notion that resource-limitation has already begun. Contrary to the assumptions of sustainability, this analysis of existing production of 16 resources finds no evidence of such limitation. Dr James Rustad promptly sent me an excel spreadsheet with the calculations for gold, a mineral not shown in his paper. It is easy to work out the procedure from the spreadsheet. The cumulative productions are divided by the initial production, Read more [...] one