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All terms in this list:

Sustainability: The use of Earth's resources in a way that will not permanently destroy or deplete them; living within the limits of Earth's biocapacity

Ecological Footprint: A measure of how much land and water area is required to supply the resources an individual or a population consumes and to absorb the wastes it produces

Biocapacity: The amount of Earth's biologically productive area, cropland, pasture, forest, and fisheries that is available to provide resources and absorb wastes to support life.

Global Hectare: (GHA) A unit of measurement representing the biological productivity (both resource-providing and waste absorbing capacity) of an average hectare of Earth.

Nonrenewable Resources: Natural resources that cannot easily be replaced; fossil fuels are an example

Renewable resources: Natural resources that are replenished after use as long as the rate of consumption does not exceed the rate of replacement

Biodiversity: The number of different species and their relative abundances in specific region or on the planet as a whole

Aquifer: An underground layer of water-bearing porous stone, earth, or gravel

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