Food

• Food insecurity is when the demand for food outweighs the supply.
• Food security is when the supply outweighs the demand.
• Undernutrition is not consuming 2-2500 calories recommended by the World Health Organisation (WHO).
• Famine is a widespread shortage of food which can lead to starvation or death in severe cases.
• Irrigation is used to supply extra water to farming areas to increase or maintain production.
• Aeroponics is the process of using air rather than soil to grow plants.
• Hydroponics is the process where plants are grown in nutrient rich water.
• Biotechnology is when plants, animals and fish are genetically modified.
• Appropriate technology is using relatively low tech strategies that are accessible to the communities they are aimed at.
• The factors that affect food supply are climate, technology, pests and diseases, water stress, conflict and poverty.
• The impacts of food insecurity are famine, undernutrition, soil erosion, rising prices and social unrest.
• Challenges that food production must overcome include water scarcity, over farming and soil degradation, poverty, crop diseases and limited space.