The participation of the biggest economies in the world is decisive. As the G8+5 countries account for more than half of the world’s emissions and population, and 71 percent of GDP (see figure 11), their commitments to emission reduction will have substantial impact. The G8+5 countries also have an important role to play as role models and pioneers laying out the infrastructure to reduce risks for other countries. We therefore urge them to show strong, coordinated leadership in the ongoing process on how to limit climate change.