Since 25 February the third volume "Mitigation of Climate Changte" of the IPCC 5th Assessment Report is ready for its second review. This scientific review is conducted in parallel to the governmental review. On behalf of the national IPCC contact point, José Romero - BAFU, ProClim- invites you to take part as an expert in this review. We hope that you agree to participate in order to guarantee a high quality of the report. As part of this review you may suggest important references (including your own publications) to make the assessment as complete as possible.