Methane
http://www.epa.gov/methane/scientific.html

United States Environmental Protection Agency


This EPA website provides basic information about methane. Topics covered include methane's role as a greenhouse gas, atmospheric concentrations of methane over time, processes that remove methane from the atmosphere, and links to atmospheric measurement data.

This resource is referenced here:
Subject: Geoscience:Atmospheric Science:Climatology :Atmospheric gases, Geoscience:Atmospheric Science:Meteorology:Atmospheric structure and composition
Resource Type: Scientific Resources:Overview/Reference Work
Focus on the Cretaceous: Human Impacts
Geochemistry Applications: Environmental Geochemistry
Topics: Atmosphere