So that's where cotton candy comes from. An ever expanding population, who needs feeding and only so much land to use to grow the crops.
To be honest, enough land to grow food crops is still a long, long way from being a problem. Mississippi alone (a backwards, rural state) is capable of growing more than 10 times the food needed to feed the current global population. The problem is with the preservation and distribution systems. That and the costs associated with said systems.