That determination was made by consulting firm Maplecroft in their Food Security Index 2010 based on 12 criteria developed in cooperation with the World Food Programme: Nutritional and health status of populations,
grain production and imports, GDP per
capita, natural disasters, conflict, and effectiveness of government, and more.
Globally we have already passed peaks or are soon to be facing them in copper, phosphorous, fish catches,
grain production, per
capita fresh water and uranium to name but a few.