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Gut 40 Jahre währt bereits die Auseinandersetzung um den Stopp des menschgemachten Klimawandels. Angesichts dessen fragen sich manche Aktivisten, ob dieser "Kampf" um die klimapolitischen Reduktionsziele, insbesondere beim Verbrauch fossiler Energieträger, noch zu gewinnen sei. Die Klimaengagierten aller Länder haben sich zwar vereinigt, aber es handelt sich doch, des ausbleibenden Erfolgs wegen, um eine in Teilen depressionsgeneigte Gemeinschaft. Jeremy Leggett, Mitstreiter der ersten Stunde, will mit seinem aktuellen Buch "The Winning of the Carbon War" dagegen Hoffnung und Zuversicht verbreiten. Ein Erfolg sei möglich und bereits in Ansätzen absehbar. Seine Erfahrungsbasis: Zugänge, die sich aus dem facettenreichen, beruflichen Weg des Autors ergeben. Wer ist dieser Jeremy Leggett und worauf fußt seine Expertise?
In recent years, a number of energy scenario studies which aim to advise policy makers on appropriate energy policy measures have been developed. These studies highlight changes required to achieve a future energy system that is in line with public policy goals such as reduced greenhouse gas emissions and an affordable energy supply. We argue that behavioural changes towards energy-sufficient lifestyles have considerable potential to contribute to public policy goals and may even be indispensable for achieving some of these goals. This potential should, therefore, be reflected in scenario studies aiming to provide comprehensive advice to policy makers. We analyse the role that energy-sufficient lifestyles play in prominent recent global energy scenario studies and find that these studies largely ignore the potential of possible behavioural changes towards energy-sufficient lifestyles. We also describe how such changes have been considered in several other scenario studies, in order to derive recommendations for the future development of global energy scenarios. We conclude that the inclusion of lifestyle changes in energy scenarios is both possible and useful. Based on our findings, we present some general advice for energy scenario developers on how to better integrate sufficiency into future energy scenario studies in a quantitative manner.