Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--21st century.
Famines--History--21st century.
Food consumption--History--21st century.
Food industry and trade--Forecasting.
Food supply--History--21st century.
Forests and forestry--History--21st century.
Population--History--21st century.
Princeton subject headings:
Agriculture--Economic aspects--21st century.
Famines--History--21st century.
Food consumption--History--21st century.
Food industry and trade--Forecasting.
Food supply--History--21st century.
Forests and forestry--History--21st century.
Population--History--21st century.