1975 年 91 巻 1053 号 p. 699-707
The increase in demand for energy, coupled with an increased concern for environmental quality, has developed a real shortage of natural gas and induced shortage of petroleum.
From the necessary of clean gaseous and liquid fuels and electricity from coal, the researches and developments as the national projects have begun.
Review was made on clean fuels from coal at the political and technological view points.