The analysis and interpretation of recent atmospheric,
oceanographic, and earth sciences data suggests that significant
changes in current global climate patterns may occur as a result of
the accumulation of carbon dioxide (CO2) and other
greenhouse gases in the Earth's atmosphere. The nature of area-or
region-specific climate shifts are still uncertain with regard to
type (i.e., temperature change, precipitation modification, change
in frequency of severe storms, sea level fluctuations, etc.),
magnitude, and timing. Given the possible severe and irreversible
consequences of climate change to global socio-economic parameters,
further study of greenhouse gas emission rates and emission
reduction techniques is warranted.
Carbon dioxide is hypothesized to contribute approximately half
of the increasing concentrations of greenhouse gases that are
potentially creating shifts in global climate patterns. The
atmospheric concentration of CO2 has increased from
about 280 ppm in 1800 to 353 ppm in 1990 (Houghton et al., 1990).
The current rate of increase in atmospheric CO2
concentration is 0.5 percent per year (Houghton et al., 1990).
Although natural exchanges of CO2 between the atmosphere
and the biosphere (oceans, biomass, soils) are estimated in excess
of 200 billion tons per year of carbon, the current 5.5 billion
tons of carbon emissions (equivalent to 20.2 billion tons of
CO2) resulting from fossil fuel combustion is thought to
be a primary factor in the rise in atmospheric CO2
concentration in the past 180 years (Lash of and Tirpak, 1989).
Between 0.4 and 2.6 billion tons of carbon emissions (1.5 to 9.5
billion tons of CO2) are attributed to
The largest sources of anthropogenic CO2 are from
fossil fuel combustion, including coal, oil, and natural gas. Coal
and oil each contribute about 40 percent with natural gas
contributing about 20 percent to the total fossil fuel emissions of
CO2. Because of the large part CO2 plays in
estimates of total climate change potential, coal and oil can each
be expected to contribute about 20 percent of the total change.
Consequently, the examination of the energy industries I important
in understanding the emissions from such sources in terms of
potential impacts to global climate change.