Human population, carrying capacity and resource use 3.8 Environmental demands of human populations.

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Andrew Flynn Cardiff University

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Presentation transcript:

Human population, carrying capacity and resource use 3.8 Environmental demands of human populations

Objectives Ecological footprint Socio-economic influences on population growth

Ecological footprint Land area that will meet the needs of a population To determine footprint, land used to produce: – Food – Energy – Buildings – Ecological support

Factors affecting footprint Fossil fuel / renewables Energy demand Import / export resources Disposables / recyclables Meat / vegetable diet

Carbon footprint Easier to determine Food consumption / food production + Carbon emission / carbon fixation

Differences in footprint USA – 10 ha / person China – 1.2 ha / person – Spending power – Food – Energy – Import / export of resources – Population

Population policies Political actions to influence population growth – why? Pronatalist Anti-natalist

Demographic transition model Review – ?

Urbanization & demographic change Relate this to DTM From population sink to source Urban migration to urban births

Technology, resource & population Societies may be classified according to – Technological innovation – Population-resource ratio Societies go through development paths

Perspectives Ecological exploitation Economic prosperity Ecological awareness

Summary Ecological footprint Socio-economic influences on population growth