Evaluate our ecological footprint as a measure of the relationship between population size and resource consumption.

What is a resource? Is this a resource?

resources…….

Resources are things people need to live and do their work Types of resources: basic, Renewable, non renewable, primary, secondary, physical 1.Will run out in the future non renewable 2. Won’t run out as they can be reused renewable 3. Comes straight out of the ground or ocean Primary 4. Is made or manufactured by people Secondary 5. Can’t live without them Basic 6. Comes from nature physical How can we measure resources used by people?

An ecological footprint is…. The theoretical measurement of the amount of land and water a population requires to produce the resources it consumes and to absorb waste, under its prevailing technology Measured in global hectares hTo

To calculate this we use……. Arable land – amount of land used for growing crops Pasture land – feeding farmed animals Forests – for fuel, furniture, and ecosystem stability Oceans – viability/ supply of food, health Infastructure needs – eg.transport, factories, housing Energy costs – land needed for absorbing CO2 and other energy wastes (doesn’t include species extinction or pollution yet!)

Ecological Debtors & Creditors List 5 debtors and 5 creditors: how do you know this?

The ecological footprint of a place may change over time with population changes…. Increase in footprint due to: Development Consumption Diet change (eg. vegetarian - meat eating in India) Decrease in footprint due to: Government policy such as pollution laws or renewable energy policies Economic recession reduces consumption High cost of fuel reduces consumption

Biological Capacity: Biocapacity The capacity of a productive area to generate these resources and to absorb waste. UNSUSTAINABILITY occurs when the ecological footprint exceeds biocapacity

International variation in Footprint…