This
review provides an overview of the environmental impacts of
combustion-based electricity generation technologies from six different
energy sources, hard coal, brown coal, natural gas, diesel, landfill
gas, and wood biomass, using the compiled information from life cycle
assessment (LCA) studies. Hard coal has the highest global warming
and ecotoxicity impacts, while brown coal and diesel both have high
impacts in three out of 10 impact categories. Energy recovery from
landfills gas exhibits a great potential to reduce the adverse impacts
of landfills without the energy recovery although the level of reduction
depends on the energy recovery technologies. The reduction potential
of wood biomass-based electricity shows the variability affected by
the efficiency of electricity generation and transport distance of
the biomass. The application of carbon capture and storage (CCS) technologies
to current power generation systems demonstrates great reduction potential,
particularly in global warming impact with the extent of reduction
varying with the applied CCS technologies. This study points out the
necessity for standardization of the LCA method for a better comparison
of impact assessment results for different fuel sources. An integrated
method of LCA with a geographic information system (GIS) is suggested
to understand the spatial variability of the impacts of power stations
and to investigate the synergetic impacts that could be induced by
the close geographical proximity of power stations.