Food, the Environment and Food Security
Food and the Environment
The food on your plate has already travelled a long journey — sometimes thousands of miles. Every stage of that journey, from the farm to the factory to the shop shelf, leaves an environmental mark. Understanding those marks — and what we can do about them — is an increasingly important part of food literacy.
Food Miles and Carbon Footprint
Food miles measure how far food travels from farm to fork. A bag of runner beans flown from Kenya to a UK supermarket generates far more carbon dioxide than the same beans grown in a British garden in summer. Carbon footprint is the broader measure — it accounts for all greenhouse gas emissions associated with producing, processing, packaging and transporting food.
Buying seasonal food reduces both food miles and carbon footprint. British strawberries in June travel a short distance and need no artificial growing conditions. The same strawberries imported from Spain in December required heated glasshouses and long-haul lorry transport, dramatically increasing their carbon footprint. Choosing seasonal and local food where possible is one of the most practical steps a consumer can take.
Food miles measure the distance food travels from farm to consumer. Buying seasonal and locally produced food reduces food miles, lowers carbon dioxide emissions from transport, and reduces the need for energy-intensive glasshouse growing.
Packaging and Environmental Issues
Food packaging serves essential functions: it protects food from contamination, extends shelf life, provides labelling information and enables safe transport. However, excessive packaging — particularly single-use plastics — creates significant environmental problems. Much plastic packaging ends up in landfill or water systems where it takes hundreds of years to break down. Glass and cardboard are more recyclable but heavier to transport, increasing fuel use. Retailers and manufacturers are under growing pressure to reduce packaging, switch to recycled materials, and design packaging that can be collected and reused.
When evaluating packaging in your exam, avoid saying it is simply “bad”. Packaging prevents food waste (which also has a carbon cost), keeps food safe from bacterial contamination, and makes transport practical. A balanced exam answer weighs the environmental cost of the packaging material against the food waste it prevents. For example: a plastic film on a prepared salad extends shelf life by several days, potentially saving more environmental damage than it causes — provided the plastic is recycled. The written paper rewards this kind of nuanced, both-sides reasoning.
Food Waste
Food waste occurs at every stage of the supply chain: on the farm (produce left unharvested because it doesn’t meet cosmetic standards), during processing and retail (products approaching use-by dates), and in the home. Households throw away approximately 9.5 million tonnes of food waste per year in the UK, much of which is still edible. Wasted food represents wasted energy, water and labour. Rotting food in landfill also produces methane, a potent greenhouse gas. Practical ways to reduce household food waste include meal planning, correct food storage, using leftovers creatively (a Sunday roast chicken provides stock, sandwiches and stir-fry meat for days), and freezing food before it reaches its use-by date.
Reducing food waste saves money, conserves the energy and water used to produce food, and cuts methane emissions from landfill decomposition. Practical strategies include meal planning, correct storage, creative use of leftovers and freezing food before it spoils.
Food Security: a Global Challenge
Food security means everyone having reliable access to enough safe, nutritious and affordable food. Global food security is under increasing pressure from several interconnected challenges.
Climate change and global warming are shifting growing seasons and making weather patterns less predictable. Regions that once reliably produced wheat or maize are experiencing unpredictable frosts, heat waves and unseasonal rainfall. Drought and flooding directly destroy crops and make farmland unusable. Extreme drought in East Africa has repeatedly caused harvest failures and food crises in recent decades. Flooding in low-lying delta regions such as Bangladesh regularly destroys rice crops.
A growing global population puts more pressure on finite agricultural land. The world population is expected to reach around 10 billion by 2050, meaning food production will need to increase substantially on roughly the same area of farmland. Insufficient land for growing food is worsened by urbanisation, soil degradation and water scarcity.
Food poverty is specifically about affordability and access at the individual or household level — a person is in food poverty if they cannot afford or physically access a nutritious diet. Food security is a broader concept that covers availability at national and global scale. A country can have food security (enough food is produced or imported) while individuals within it experience food poverty (they cannot afford it). In your exam, use the correct term for the correct scale of problem.
Fairtrade and GM Foods as Responses
Fairtrade is a certification scheme that guarantees farmers in developing countries a minimum fair price for their produce — whether coffee, cocoa, bananas or cotton. The Fairtrade premium also funds community projects such as schools and clean water. Buying Fairtrade products directly supports food security and sustainable livelihoods in some of the world’s most vulnerable farming communities. Genetically modified (GM) foods are also proposed as a response to food security challenges: drought-tolerant GM crops, for example, could maintain yields in regions where conventional varieties would fail. However, concerns about biodiversity, corporate control of the seed supply and long-term health effects mean GM remains controversial as a food security strategy.