New approaches to enhance mitigation action are currently being discussed in the context of the UNFCCC, in order to set the stage for the future of the Kyoto Protocol and for a larger involvement of all countries in emissions reduction policies. One of the issue under discussion is the implementation of existing mechanism, such as CDM. But the challenge is in setting up methodologies applicable to multiple projects, regardless of specific conditions. Corrado Clini, Director General of the Ministry of the Environment and Territory and Sea Protection of Italy, and Francesco Presicce, expert in sustainability, climate negotiation and energy, argue why it could be done in the perspective of the future UNFCC discussions.