Ch.4 Population and Food

connection between population & food

• population growith is connected to food production

• agriculture must develop to support large settlements/permanent communities

Agriculturl development depends on…

• soil conditions

• water source reliability

• climate

subsistence agriculture

food grown mainly for family or local consumption

commercial agriculture

food produced for sale and global markets

Thomas Malthus

argued population growth would eventualy exceed food supply

Malthusian Theory

Population grows geometrically (1,2,4,8)

Food supply grows arithmetically (1,2,3,4)

therfore population may outgrow food resources

Malthus’ Predictions

famine, disease, war - positve checks to keep population size down

Preventive checks

delayed marriage, family planning, lower birth rates

Intensification

producing more food from the same amount of land

Green Revolution

introduced high yield crops and modern farming

postive and negative effects

Food supply and waste

main issue is food distribution, causes waste

hunger

chronic lack of enough food for healthy living

famine

extreme food shortage effecting large populations

food insecurity

lack of reliable access to nutritous food

population pressure

increased demand for cropland, water, and resources

agriculture

deliberate modification of Earth;s surgace through cultivating plants and rearing animals for sustenance or profit