Klimaschutz in föderalen Mehrebenensystemen

The promotion of energy efficiency is seen as a main cornerstone for establishing a sustainable energy system. A complex body of energy efficiency law has emerged within the European Union and the USA, two federal multi-level governance systems, over the last decades. However, the necessary energy efficiency turnaround has not been achieved.
Therefore, the question remains open how to make climate protection work in federal multi-level governance systems. How can existing regulations regarding the promotion of end-user oriented energy efficiency be improved in federal multi-level governance systems?
The author examines the European and German energy efficiency law in comparison to the US and Californian energy efficiency law and points out the advantages and disadvantages of the energy efficiency promotion in the two legal systems.