Food Security and Global Challenges

This lesson covers food security and the global challenges facing food production, as required by the AQA GCSE Food Preparation and Nutrition specification (8585), section 3.6. You need to understand what food security means, the threats to it, and the potential solutions including GM foods and Fairtrade.

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What Is Food Security?

Food security exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food to meet their dietary needs. Food insecurity occurs when this is not the case.

Components of Food Security

Component	Meaning
Availability	Enough food is produced or imported to feed the population
Access	People can physically and economically obtain food (they can reach shops and afford the prices)
Utilisation	People have the knowledge and resources to prepare and eat food safely and nutritiously
Stability	Food supply is reliable over time, not disrupted by seasonal changes, conflicts or economic crises

Food Insecurity in the UK

Food insecurity is not just a developing-world issue:

Issue	Detail
Food banks	Over 2.1 million emergency food parcels distributed by the Trussell Trust in 2022/23
Holiday hunger	Children who receive free school meals during term time may not eat properly during holidays
Food deserts	Areas with limited access to affordable, nutritious food (especially in deprived urban and rural areas)
Cost of living	Rising food prices make healthy eating unaffordable for many families

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Global Challenges to Food Security

mindmap
  root((Threats to<br/>Food Security))
    Climate Change
      Drought
      Flooding
      Extreme weather
      Rising temperatures
      Changing growing seasons
    Population Growth
      9.7 billion by 2050
      Increasing demand
      More mouths to feed
    Conflict and Instability
      War disrupts farming
      Displacement of people
      Destruction of infrastructure
    Economic Factors
      Poverty
      Food price volatility
      Trade barriers
    Environmental Degradation
      Soil erosion
      Water scarcity
      Biodiversity loss
      Deforestation

1. Climate Change

Impact	Detail
Drought	Reduced rainfall in some regions leads to crop failure; water scarcity for irrigation
Flooding	Destroys crops, livestock and farmland; contaminates water supplies
Extreme weather	More frequent storms, heatwaves and cold snaps damage crops and disrupt food supply chains
Rising temperatures	Changes which crops can grow where; pests and diseases spread to new areas
Sea level rise	Flooding of low-lying farmland; saltwater contamination of freshwater sources
Changing seasons	Shifts in growing seasons disrupt traditional farming patterns

2. Growing Population

Issue	Detail
Current population	Approximately 8 billion (2024)
Projected 2050	Approximately 9.7 billion
Increased demand	More people need more food — global food production must increase by an estimated 60–70% by 2050
Changing diets	As developing countries become wealthier, demand for meat and dairy increases, which requires more land and resources per calorie than plant-based food
Urbanisation	More people living in cities means less agricultural land and more complex supply chains

3. Water Scarcity

Agriculture uses approximately 70% of global freshwater. Water scarcity is a growing problem:

• Overuse of underground aquifers
• Drought from climate change
• Pollution of water sources
• Competition between agriculture, industry and domestic use
• Unequal distribution — some regions have abundant water, others face severe shortages

4. Soil Degradation

Problem	Cause	Impact
Soil erosion	Deforestation, overgrazing, monoculture	Loss of fertile topsoil; reduced crop yields
Loss of nutrients	Intensive farming without rotation	Soil becomes infertile; requires more synthetic fertiliser
Desertification	Climate change, overgrazing, deforestation	Previously productive land becomes desert
Compaction	Heavy machinery	Reduces water absorption; damages soil structure

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Potential Solutions

GM (Genetically Modified) Foods

GM technology offers potential solutions to food security challenges: