1 Atmospheric Methane: An Introduction.- Record of Atmospheric Methane.- 2 The Ice Core Record of Atmospheric Methane.- 3 The Isotopic Composition of Atmospheric Methane and Its Sources.- Formation and Consumption of Methane.- 4 Biological Formation and Consumption of Methane.- Sources and Sinks.- 5 Can Stable Isotopes and Global Budgets Be Used to Constrain Atmospheric Methane Budgets?.- 6 Methane Sinks, Distributions, and Trends.- 7 Sources of Methane: An Overview.- Methane Emissions from Individual Sources.- 8 Ruminants and Other Animals.- 9 Rice Agriculture: Factors Controlling Emissions.- 10 Rice Agriculture: Emissions.- 11 Biomass Burning.- 12 Wetlands.- 13 Waste Management.- 14 Fossil Fuel Industries.- 15 Geological Sources of Methane.- The Environmental Role of Methane and Current Issues.- 16 Methane in the Global Environment.