If dangerous climate change is still to be avoided, a reversal of current trends must be achieved within the next ten years, and greenhouse gas emissions worldwide must be halved by 2050 compared with a 1990 baseline. However, there is a widening gap between the action that is urgently needed and current climate policy. The WBGU is therefore convinced that a new climate policy dynamic is required worldwide and that Germany's double presidency of the European Union and P of G8 offers a dual opportunity to drive climate protection forward. The WBGU's core messages are: