||This course aims to introduce green technologies and their influences on human life in the 21st century. The contents consist of the most important topics about the clean energy and energy conservation technologies. The clean energy technology consists of wind energy, solar energy, hydraulic energy, earth interior energy, bioenergy, roadway energy, sound energy, fuel cell, electric vehicles, and so on. The energy conservation technology consists energy save buildings, variable frequency air-condition, etc.. The environmental protesting technology includes carbon recapture etc.. This course will talk the technical principles and their general developing situations.