EVR 1001 Lecture Notes - Lecture 7: Genetically Modified Maize, Agroforestry, Crop Rotation
9 Oct 2016
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Document Summary
Human land use affects the environment in many ways. Tragedy of the commons: the tendency of a shared, unregulated public resource to become depleted by people acting in self-interest for short-term again. Externalities: a cost or benefit of a good or service not included in the purchase price of that product or service. Negative externalities such as pollution and other tragedy of the commons effects are central to environmental science. The maximum amount of a renewable resource that can be harvested without compromising. Elinor ostrom showed that common use of a resources does not always result in the tragedy of the commons because the shared resource will be depleted, forcing users to turn to other resource. (can check lai) The nation with the largest percentage of publically held land is the united states. U. s has 25,800 protected areas covering 294,476 km2 (499,800 sq mi). These include state, federal and private protected areas.
