1. Principles of a Resource/Reserve Classification for Minerals: a report detailing the classification scheme used by the U.S. government to measure mineral reserves.
2. Mineral Resources Program: the website for the Minerals Resources Program of the U.S. Geological Survey. The site includes links to a significant amount of technical data as well as information about the environmental implications of mining.
3. Municipal Solid Waste Management: the EPA’s website on municipal waste management. It includes information about recycling, pay-as-you-throw programs, and the management of waste nationally and in each state.