Energy systems in transition under the conditions of supply and environment

The current discussion about future energy supplies is characterized by remarkable compartmentalizations and contradictions. Here, the various conflicting positions, challenges, and mutually exclusive assertions are broadly sketched. Basically, they reflect the complex nature of energy systems and their multiple interactions, as well as the fact that certain individual aspects are emphasized by some observers, while others, which may be equally deserving of concern, are not acknowledged at all. Figs