This study by Ecofys and Wuppertal Institut provides reference emissions and three mitigation scenarios (no-regret, co-benefit and ambitious) for Brazil, China, India, Mexico, South Africa and South Korea until 2020. It makes an illustrative proposal of ambitious reductions in developed countries and a contribution by developing countries to allow global warming to stay below the 2°C. What could be the contribution of developing countries in an international climate change agreement post 2012?