Tragedy of the Commons
The tendency of a shared, limited resource to become depleted if it is not regulated in some way
Externality
The cost or benefit of a good or service that is not included in the purchase price of that good or service, or otherwise accounted for
Rangelands
Dry, open grasslands primarily used for grazing cattle
Forest
Land dominated by trees and other woody vegetation and sometimes used for commercial logging
Clear Cutting
A method of harvesting trees that involves removing all or almost all of the trees within an area
Selective Cutting
The method of harvesting trees that involves the removal of single trees or a relatively small number of trees from the larger forest
Tree Plantation
A large area typically planted with a single fast-growing tree species
Endangered Species Act
A 1973 U.S. law designed to protect plant and animal species that are threatened with extinction and the habitat that supports those species
Ecological Footprint
A measure of the area of land and water an individual, population, or activity requires to produce all the resources it consumes and to process the waste it generates
Carbon Footprint
A measure of the total carbon dioxide and other greenhouse gas emissions from the activities, both direct and indirect, of a person, country, or other entity
IPAT Equation
Impact = Population x Affluence x Technology
Sustainability
Being able to use a resource or engage in an activity now without jeopardizing the ability of future generations to engage in similar activities later
Sustainable Development
Development that balances current human well-being and economic advancement with resource management for the benefit of future generations
Maximum Sustainable Yield
The largest quantity of a renewable resource that can be harvested indefinitely
Anthropogenic
Derived from human activities