Global concentrations of
methane in the troposphere. Adapted from Blake and Rowland (1987).
Average atmospheric methane
concentrations. Adapted from Khalil and Rasmussen, C and E News,
64 (47), 23.
Methane, CO2 and
temperature profiles. Adapted from Woodwell et al, Scientific
American, April 1989
Estimated sources and sinks
of methane. Adapted from the IPCC supplemental Report,
1992.
Trends in domestic animal
population (1890-1985). EPA, 1989: Policy options for stabilizing global
climate.
Rough rice production
(1984). EPA, 1989: Policy options for stabilizing global
climate.
Estimated sources and sinks
of carbon monoxide. EPA, 1989: Policy options for stabilizing global
climate.
N2O concentrations from
1977-1988 and past 2000 years. Houghton, J.T., G.J. Jenkins, J.J.
Ephraums eds, 1990: 1990 Intergovernment Panel on Climate Change,
Cambridge University Press, 364 pp.
Estimated sources and sinks of
nitrous oxide. IPCC, 1990.
Nitrogen
fertilizer consumption. EPA: Policy Options for Stabilizing Global
Climate.
