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the natural resources and natural services that keep us and other species alive and support out economies
rule of 70
Doubling time (in years) = 70/(percentage growth rate). See doubling time, exponential growth.
Highest rate at which a renewable resource can be used indefinitely without reducing its available supply
nonpoint source pollution
pollution that comes from many sources rather than from a single, specific site
The amount of biologically productive land and water needed to support a person or population.
tragedy of the commons
situation in which people acting individually and in their own interest use up commonly available but limited resources, creating disaster for the entire community
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