Methane Sources and Emissions
http://www.epa.gov/methane/sources.html

United States Environmental Protection Agency

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This site, published by the EPA, discusses the sources of methane emissions, including landfills, coal mining, the oceans and livestock, among others.

This resource is referenced here:

• Integrating Research and Education:Impacts on Native Lands:Crow: Coalbed Methane
• Integrating Research and Education:Impacts on Native Lands:Crow: Impacts

Subject: , Environmental Science:Energy:Fossil Fuels, Environmental Science:Ecosystems:Biogeochemical cycling, Environmental Science:Waste:Waste Solid :Landfills
Resource Type: Scientific Resources:Overview/Reference Work
Focus on the Cretaceous: Human Impacts
Geochemistry Applications: Environmental Geochemistry
Topics: Energy/Material cycles