Explain the concepts of food security and food sustainability and evaluate factors that affect the supply of safe, nutritious food

What this dot point is asking

You need to define food security and food sustainability, explain the factors that threaten or support them, and discuss how food can be supplied both now and in the future.

Food security

Food security exists when all people, at all times, have reliable access to enough safe and nutritious food to meet their needs for an active, healthy life. It has several dimensions:

• Availability: enough food is produced or imported.
• Access: people can physically reach and afford it.
• Use: the food is safe, nutritious and used well.
• Stability: the supply is reliable over time, not disrupted by crises.

Food insecurity ranges from worrying about running out of food to hunger and malnutrition. It occurs even in wealthy countries when cost, remoteness or disadvantage limit access, which links to the economic influences in Topic 3.

Food sustainability

Food sustainability means producing food in ways that meet present needs without compromising the ability of future generations to meet theirs. A sustainable food system protects the environment (soil, water, biodiversity), remains economically viable for producers, and is socially fair.

Unsustainable practices, such as over-using water, clearing land, overfishing or relying heavily on fossil fuels and fertilisers, can raise output now but damage the resources that future food supply depends on.

Factors affecting food supply

Many factors affect whether safe, nutritious food reaches people:

• Climate and environment: drought, flood and climate change reduce yields and disrupt supply.
• Cost and economics: food and fuel prices affect both production and what people can afford.
• Distribution and transport: food must be stored and moved safely; remote communities face higher costs and less choice.
• Population and demand: a growing population increases the food that must be produced.
• Food loss and waste: large amounts of food are lost in production and wasted by consumers, reducing the effective supply.
• Production methods: farming, fishing and processing methods affect both quantity and the environmental footprint.

Evaluating the trade-offs

Improving food supply often involves trade-offs. Intensive farming can raise output and lower prices (helping access) but may harm the environment (reducing sustainability). Importing food improves availability but adds transport emissions. Evaluating these trade-offs, rather than naming one solution, is the kind of judgement this subject rewards, and it connects to the food technology and production methods studied alongside this dot point.

In short, food security is reliable access to enough safe, nutritious food, while sustainability is producing it without harming future supply. Climate, cost, distribution, population, waste and production methods all affect the food system, and balancing their trade-offs is central to feeding people now and into the future.