A recent article in the Guardian draws attention to another, potentially equally problematic, issue -- the peaking of phosphate production.
Phosphate production is predicted to peak around 2030 as the global population expands to a predicted 9.1 billion people by 2050. And unlike oil, where there are renewable energy alternatives to fossil fuels, there is no substitute for phosphorus, according to the US Geological Survey. ...
"Our primary source – rock phosphate – is mined for use in fertilisers and that's expected to peak around 2030. It means that right at the time we need to be doubling our food-growing capacity to feed the rising global population, we'll be starting to run out of phosphorus. It's a nightmare scenario."
The article goes on to suggest policies aimed at recovering phosphate from organic waste currently sent to landfills as a way to augment rock phosphate.