Finance

Financial economics

Futures contract

Environmental resource management

Agriculture

Climate change

Economics

Archaeology

Scenario analysis

Ecology

Geography

Population projection

Population

Projections of population growth

Food security

Medicine

Population growth

Biology

Environmental health

Nature Food

Quantified global scenarios and projections are used to assess long-term future global food security under a range of socio-economic and climate change scenarios. Here, we conducted a systematic literature review and meta-analysis to assess the range of future global food security projections to 2050. We reviewed 57 global food security projection and quantitative scenario studies that have been published in the past two decades and discussed the methods, underlying drivers, indicators and projections. Across five representative scenarios that span divergent but plausible socio-economic futures, the total global food demand is expected to increase by 35% to 56% between 2010 and 2050, while population at risk of hunger is expected to change by −91% to +8% over the same period. If climate change is taken into account, the ranges change slightly (+30% to +62% for total food demand and −91% to +30% for population at risk of hunger) but with no statistical differences overall. The results of our review can be used to benchmark new global food security projections and quantitative scenario studies and inform policy analysis and the public debate on the future of food. Across 57 global food security projection and quantitative scenario studies that have been published in the past two decades, the total global food demand is expected to rise from +35% to +56% between 2010 and 2050, and the population at risk of hunger is expected to change by −91% to +8%. Both ranges are substantially lower than previous projections.

A meta-analysis of projected global food demand and population at risk of hunger for the period 2010–2050