| 摘 要： | Over the last 20 years, it has gradually become clear that the emission of greenhouse gases constitutes a serious environmental problem for the global society. One of such gases is carbon dioxide （CO2）. At present about 25000 million tons of CO2 from fossil fuels is released into the atmosphere annually. This will increase in the foreseeable future with the increase in demand for energy. The use of fossil fuels from oil, gas and coal comprises about 33 percent of the global energy supply. It is clear that consumption of fossil-based energy will continue to grow and dominate the energy picture in several decades. One obvious challenge then is how we can moderate and gradually reduce the amount of CO2 released into the earth＇s atmosphere on a basis of the current emission. Electricity production from coal and gas will be our special concern.
|
