Methane
https://www3.epa.gov/climatechange/ghgemissions/gases/ch4.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:Meteorology:Atmospheric structure and composition, Geoscience:Atmospheric Science:Climatology :Atmospheric gases
Resource Type: Scientific Resources:Overview/Reference Work
Focus on the Cretaceous: Human Impacts
Geochemistry Applications: Environmental Geochemistry
Theme: Teach the Earth:Incorporating Societal Issues:Climate Change, Teach the Earth:Course Topics:Atmospheric Science, Teach the Earth:Teaching Topics:Weather