Section C Food Q4

• Food insecurity - A lack of access to sufficient food
• Factors affecting food supply

  • Poverty
  • Climate
  • Conflict
  • Technology
  • Pests and diseases
• How does climate affect food supply

  • Droughts and floods make it harder to grow crops
  • Decreases crop yield
  • Leading to food insecurity
• How does Conflict affect food supply

  • armies block supply chains and destroy infrastructure
  • reduces crop yield
  • Leading to food insecurity
• How does technology affect food supply

  • Pesticide, fertilisers and vertical farming help increase crop yield
  • Greater food supply
• Impacts of food Insecurity

  • Famine
  • Social unrest
  • Rising food prices
  • Malnutrition
  • Soil erosion
• Famine

  • means - extreme scarcity of food
  • Long enough people can starve to death
• Social unrest

  • People starve and blame the government
  • Causes conflict and protests
• Rising food prices

  • Poorer won’t be able to afford to buy food
  • Lower amount of food supply but same demand increases price of food
• Malnutrition

  • People don’t eat enough and are lacking nutrients
• Soil erosion

  • Not enough food to eat so farmers overgraze livestock
  • soil erosion happens and land struggles to recover
• Human food supply factors

  • Poverty - prevents people affording food and buying equipment
  • Conflict - Disrupts farming and prevents supplies
  • Food waste - Die to poor transport and storage
  • Climate change - Makes food production difficult
• Physical Factors that affect food supply

  • Quality of soil - ensures crops have key nutrients
  • Water Supply - needs to be reliable to allow food to grow
  • Pests ,diseases - can destroy vast amounts of crops
  • Extreme weather - events can damage crops
• Food supply around the world

  • Asia and north america have high production outputs
  • Africa and central america have low production outputs
• Increasing food supply

  • Hydroponics/aeroponics - Method of growing plants without soil instead with nutrient solution or water
  • New green revolution - Aims to improve yields in more sustainable way
  • Biotechnology - Genetically modified crops changes to DNA of foods to enhance properties
  • Irrigation - Artificially watering the land so crops can grow , useful in dry areas
• Sustainable food supply - Ensures that fertile soil, water and environmental resources are available for future generations
• Sustainable food supply

  • Organic farming - Without use of chemicals and fertiliser
  • Permaculture - People growing their own food and changing eating habits
  • Urban farming - Planting crops in urban areas
  • Managed fishing - Setting catching limits to stop over fishing
• Sustainable example: Fish-rice method

  • Making a dug well , filling up to grow rice , breeding fish in the flood water

  Advantages

  • increase food supply by growing rice and breeding fish
  • produces enough to eat and sell
  • esch year more can be grown

  Negatives

  • need to ensure you can afford to set up
  • if water is contaminated affects whole system
• Case study NEE - Indus Basin irrigation system

  • Largest in the world
  • involves large and small dams
  • thousands of channels provides water for pakistans rich farmlands

  Advantages

  • Improves food security by adding 40% more land for farming
  • increases yeild and range of foods

  Negatives

  • few take unfair share of water
  • water is waster and demand is increasing
  • high cost to maintain