Welcome to Global Food Supply and Demand!

In this chapter, we explore one of the most important resources on Earth: food. We will look at why some people have plenty to eat while others struggle, how our eating habits are changing globally, and what happens when our food travels thousands of miles to reach our plates. This is part of the Resource Provision section of your Geography (0460) syllabus.

1. Global Patterns of Calorie Intake

Calorie intake is the amount of energy a person gets from the food they eat. It is usually measured in kilocalories (kcal) per day.

What does the world map of food look like?

If you looked at a global map of calorie intake, you would see a clear "Development Gap":

  • High-Income Countries (HICs): In places like North America and Europe, calorie intake is very high, often exceeding \(3500\) kcal per person per day.
  • Low-Income Countries (LICs): In parts of Sub-Saharan Africa and South Asia, calorie intake is much lower, sometimes falling below the recommended minimum of roughly \(2000\)–\(2500\) kcal.

Reasons for Variation (Why it's different everywhere)

Don't worry if this seems like a lot to remember; it usually comes down to three main things:

1. Wealth (Economic factors): People in HICs have higher disposable income. They can afford more food, more meat, and more imported goods. In LICs, people spend a much higher percentage of their income just on basic staples like rice or maize.
2. Climate and Environment: Some countries have perfect weather for growing food year-round. Others face natural hazards like droughts or floods, which can destroy crops and lower the available food supply.
3. Culture and Diet: In some cultures, diets are based on high-calorie fast foods, while others focus on lower-calorie plant-based traditional diets.
Quick Takeaway

Wealth is the biggest driver of calorie intake. The richer a country is, the more calories its citizens tend to consume.

2. Changing Global Production and Consumption

The world is not eating the same way it did 50 years ago. Both the demand (what we want) and the supply (what we grow) are changing.

Why is Consumption (Demand) Increasing?

  • Population Growth: Quite simply, there are more mouths to feed. The global population is increasing, especially in LICs and MICs (Middle-Income Countries).
  • Economic Development: As countries move from LIC to MIC status, people's diets change. This is called a "dietary transition." People start eating more meat and dairy, which requires much more land and water to produce than vegetables.
  • Urbanisation: As people move to cities (Topic 7), they often switch to "Western-style" diets, which include more processed foods.

Why is Production (Supply) Increasing?

  • Technological Advances: New machinery (mechanisation), better irrigation, and the use of chemical fertilisers and pesticides have massively increased yields.
  • New Farming Methods: Techniques like aeroponics (growing plants in air/mist) and hydroponics (growing in water) allow food to be grown in places where the soil is poor.

3. Globalised Food Supplies

Have you ever eaten strawberries in the middle of winter? That is globalisation in action! Globalisation means that food is produced in one part of the world and consumed in another.

Reasons for Globalised Food

1. Consumer Demand: People in HICs want seasonal fruits and vegetables all year round.
2. Transnational Corporations (TNCs): Large companies organise the growing of food in LICs where land and labour are cheaper, then ship it to HICs for a profit.
3. Improved Transport: Technologies like containerisation (large shipping containers) and refrigerated planes/ships mean food stays fresh over long distances.

Impacts of Globalised Food Supplies

This is a favorite topic for "evaluate" or "discuss" questions. Let's look at the pros and cons:

Positive Impacts (The Pros)
  • For Consumers: A huge variety of food is available throughout the year.
  • For LICs: It creates jobs for farmers and brings money into the country's economy through exports.
Negative Impacts (The Cons)
  • Food Miles: This refers to the distance food travels. Transporting food across the world burns fossil fuels, contributing to climate change (Topic 5).
  • Environmental Pressure: LICs might use up their precious water supplies to grow "luxury" crops (like flowers or beans) for HICs, leaving less for their own people.
  • Economic Dependency: Small farmers in LICs might become too dependent on a single TNC. If the TNC changes its mind, the farmers lose everything.
Quick Review: Memory Aid

Think of "The 3 Ts" for globalised food: Transport (getting it there), Taste (we want variety), and TNCs (the companies making it happen).

4. Factors Affecting Food Supply

Why can't every country just grow enough food? There are Natural and Human factors that get in the way.

Natural Factors

  • Climate: Extreme weather like droughts (no rain) or floods (too much rain) can wipe out an entire year's harvest.
  • Pests and Diseases: Insects like locusts or fungal diseases can destroy crops.
  • Soil Quality: If the soil is thin or lacks nutrients, crops will be small and weak.

Human Factors

  • Conflict and War: When there is fighting, farmers cannot plant crops, and food supplies are often cut off as a "weapon" of war.
  • Poverty: Farmers in LICs may not be able to afford the seeds, fertilisers, or tools they need to increase their supply.
  • Government Policy: Some governments prioritise growing "cash crops" for export (to make money) rather than "subsistence crops" to feed their own people.
Key Takeaway

Food supply isn't just about farming; it's about stability. If a country is poor or at war, even the best climate won't guarantee enough food.

5. Moving Forward: Strategies to Increase Supply

To keep up with demand, the world uses several strategies. You will learn more about these in the next few chapters, but here is a quick preview:

  • Farming Techniques: Moving from simple subsistence farming to high-tech methods like aquaponics.
  • Food Aid: Providing emergency food during a crisis (like a famine).
  • Sustainability: Managing the land carefully to prevent desertification and soil erosion so the land can keep producing food for years to come.

Note: For more details on these strategies, see the chapters on "Farming Types" and "Food Insecurity".

Common Mistakes to Avoid

  • Don't say "LEDV/MEDC": The new syllabus uses LIC (Low-Income Country), MIC (Middle-Income Country), and HIC (High-Income Country).
  • Don't just mention "hunger": Use the geographical term "Food Insecurity" or "Low Calorie Intake."
  • Don't forget the environment: When discussing globalisation, always mention food miles and the carbon footprint.

Great job! You've covered the basics of how food moves and why calorie patterns exist. Ready for the next topic?