Annual energy reviews-2007

The important times related to energy in 2007 fiscal year on present state on 1) energy demand and supply, 2) development and research trends on application technology of energy resources, 3) development and research trends on technology of energy conversion, 4) environment, and 5) miscellaneous are described. On the first item, trend on energy demand and supply, present state of energy supply, and trend of business field on energy demand and supply are explained. On the second item, petroleum, coal, natural gas, nuclear energy, natural energy, waste resources, and secondary energy resources are explained. On the third item, combustion theory, trends on boiler, industrial furnace, engine, thermal energy system, high efficiency power generation technology are explained. And, on the last item, trend on environment problem and developmental trend on environmental conservation technology are explained. (J.P.N.)