Lonewolf sent me this link –
Although food production has more or less kept pace with population growth by increasing 50 percent between 1980 and 2000, it is unclear whether we’ll have enough food to feed the estimated three billion more mouths in 2050. To do that, Arnalds said, we’d need to produce more food within the next 50 years than humankind has during the last 10,000 years combined, which might be a nearly impossible task considering global food production per hectare is already on the decline. The Dirt On Soil Erosion
I’d not worry about three billion more mouths to feed – we’ll never reach that number. The energy decline will make absolute certainty of that with a global crash if population levels.
But soil erosion is a rather huge issue. This is at the heart of The Final Empire by William Kotke (see chapter 3).
Intensive and abusive farming practices have long led to erosion, but now we have other problems too. Slash and burn in the Amazon rain forests for palm oil plantations, which collapse after just three or four years is causing huge erosion issues and sedimentation in the rivers and streams (to say nothing of the destroyed forests). This is occurring in rain forest regions all over the world.