causes of poor food supply
Post on 25-Jun-2015
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The Causes of Poor Food The Causes of Poor Food SupplySupply
Map of World HungerMap of World Hunger
Task: What does the map show?Task: What does the map show?
What is the problem?What is the problem? Approximately 1.2 billion Approximately 1.2 billion
people suffer frompeople suffer from under-nutrition under-nutrition (deficiency of calories (deficiency of calories and protein)and protein)
Some 2 to 3.5 billion Some 2 to 3.5 billion people suffer frompeople suffer from malnutrition malnutrition (deficiency (deficiency of vitamins and minerals)of vitamins and minerals)
Task: Write down definitions of under-nutrition and malnutrition
What are the causes of poor food What are the causes of poor food supply?supply?
Task: Put the following causes into your Venn diagram to show whether the causes
are social, economic or environmental.
Social Economic
Environmental
•PovertyPoverty•The problem is that many people don’t have enough money to buy food (more than one billion people earn less than 60p a day)
•Poor farmers find it difficult to borrow money to get over temporary difficulties such as periods of drought so end up eating animals or seeds which should be kept for next years crop.
•Land OwnershipLand Ownership
The vast majority of The vast majority of good land belongs good land belongs to a few wealthy to a few wealthy owners owners
The vast majority of The vast majority of the rural population the rural population to miserably small to miserably small parcels of the worst parcels of the worst possible farmlandpossible farmland
•Commercial FarmingCommercial Farming Examples of such land use Examples of such land use
include:include: The tobacco industry for The tobacco industry for
tobacco exportstobacco exports Tea and coffee plantations Tea and coffee plantations
for tea and coffee exportsfor tea and coffee exports Floriculture for flower Floriculture for flower
exportsexports Sugar cane growing for Sugar cane growing for
sugar exports sugar exports Beef for use in fast food Beef for use in fast food
industriesindustries
•War and ConflictWar and Conflict
War can disrupt War can disrupt farming by farming by preventing people preventing people from working on from working on the landthe land
War can also cause War can also cause problems in problems in transporting food transporting food from one area to from one area to another.another.
•Poor TransportPoor Transport
Poor infrastructure Poor infrastructure may mean food fails may mean food fails to reach remote to reach remote areas. This is a areas. This is a particular problem in particular problem in drought.drought.
•Lack of Appropriate Lack of Appropriate TechnologyTechnology
Farmers Farmers sometimes have sometimes have low crop yields due low crop yields due to a lack of advice to a lack of advice or appropriate or appropriate equipment.equipment.
•OvergrazingOvergrazing
Too many animals Too many animals on a piece of land on a piece of land leads to it leads to it becoming bare and becoming bare and soil erosion can soil erosion can then occurthen occur
•Soil ErosionSoil Erosion
Soil erosion is Soil erosion is caused by over caused by over using land. Erosion using land. Erosion results in loss of results in loss of top soil which top soil which reduces soil fertility reduces soil fertility and therefore crop and therefore crop yields.yields.
•DroughtDrought
Too little or Too little or unreliable rainfall unreliable rainfall can cause crops to can cause crops to fail.fail.
Why do some places get so Why do some places get so little precipitation?little precipitation?
•Moist winds blowing over Moist winds blowing over mountains will bring relief rainfall on mountains will bring relief rainfall on one side of the mountains but leave one side of the mountains but leave a rain shadow on the other.a rain shadow on the other.
Air blowing across Air blowing across continents continents gradually lose the gradually lose the moisture picked moisture picked up from the sea. up from the sea.
So areas of a So areas of a continent on the continent on the opposite side to opposite side to the prevailing the prevailing wind tend to be wind tend to be drier.drier.
Why do some places get so Why do some places get so little precipitation?little precipitation?
Anticyclones Anticyclones (high pressure (high pressure systems) systems) create sinking create sinking air which is air which is warmed, which warmed, which causes water causes water moisture to moisture to evaporate evaporate from it.from it.
Why do some places get so Why do some places get so little precipitation?little precipitation?
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