Recently, the Climate Action Network has begun to take the effort-sharing question more seriously, a development for which we take some credit. In any case, we have made a considerable effort to participate in the CAN debate, and to learn from it. This effort has included a framing paper called Principle-based burden sharing in an MRV world, an invited statement to the CAN post-Copenhagen strategy conference, and a sustained, and influential, role in the subsequent “Common but differentiated Responsibilities and respective capabilities” working group. The headline here is that, as the post-Copenhagen negotiations continue, this working group only becomes more important — both AOSIS and the LDCs have requested input from CAN on the equity and effort questions.