Many people, professionals and non-professionals alike, recognize that it is of critical importance to solve global energy and environmental issues. For this purpose, it is essential to have a scientific understanding of what is meant by the ?energy? issue is and the ?environmental? issue. The concept of ?exergy? is a scientific concept that exactly fits. The concept of ?energy? is a scientifically-well established concept, namely ?to be conserved?. Then the question is what is really... Mehr