Food security is the physical and economic availability of food that allows all individuals to obtain the balanced diet needed for an active and healthy life. In IB ESS, this is core SL and HL content in Subtopic 5.2: Agriculture and food.
How Food Security Works
Food security depends on more than producing enough food. A society must have sufficient supplies, but people must also be able to access and afford nutritious food consistently.
| Dimension | Meaning in food security |
|---|---|
| Physical availability | Enough food is produced, imported, stored and distributed to reach consumers. |
| Economic availability | Individuals have sufficient income, and food prices remain affordable. |
| Nutritional suitability | Available food provides a balanced diet rather than merely enough calories. |
| Reliability | Access is maintained despite seasonal changes, conflict, economic shocks or extreme weather. |
Food insecurity may therefore result from drought, soil degradation, conflict, poverty, unequal distribution, food-price increases, inadequate transport or food waste. Climate change can intensify several of these pressures by reducing crop yields and increasing the frequency of extreme weather.
A key misconception is that producing enough food automatically creates food security. The world produces enough food to feed approximately eight billion people, but food is distributed unequally and substantial quantities are lost or wasted. This connects food security to environmental justice, because marginalized groups are often least able to afford food or influence land-use decisions.
The Green Revolution in India increased cereal production through high-yield crop varieties, irrigation, synthetic fertilizers and pesticides. It improved national food availability, but benefits were uneven because wealthier farmers could access inputs more easily, while intensive farming created environmental costs such as soil degradation and water depletion.
Exam Technique
For a definition question, state both physical and economic availability and link them to a balanced diet and an active, healthy life. For an “explain” or “discuss” question, distinguish food production from access, develop environmental and socioeconomic factors, and use a named example such as India’s Green Revolution.