Under the principle of “common but differentiated responsibilities,” (Article 3.1 of the UNFCCC) non-Annex I parties have so far been exempted from emission limitation or reduction commitments. However, the pressure is mounting on those countries, especiallymajor emitting developing countries, to contribute actively to the mitigation of climate change. Participation by these developing countries in a future international climate regime is oftencalled for, but it is usually unclear how and how much these countries should participate, what kind of support they need and in which sectors. This project aims to provide a more detailed view on six countries to understand how they could best make a contribution to the regime and how they could best be supported in limiting their greenhouse gas emissions.