Perspectives Climate Research led this research project in cooperation with the University of Freiburg, coordinating the overall tasks and executing the following work packages: The first work package consisted of a quantitative analysis of the potential future emission reduction contributions of the Clean Development Mechanism (CDM) portfolio. The second analysed how new market-based mechanisms can contribute to a future enhancement of ambition in the national reduction contributions based on identifying transformative pathways from the Kyoto Protocol to the Paris Agreement. The third work package elaborated institutional design options for crediting mechanisms for negative emission technologies. Key findings have been published in several peer-reviewed articles, including on:-the potential of auctions for emission reductions to enhance the efficacy of climate finance- governance of negative emission reduction technologies.Further scientific articles and book chapters have been written including in collaboration with internationally leading researchers. In order to increase the quality of the publications, the preliminary results were presented to the epistemic community at a scientific conference as well as a side event at the UNFCCC Meeting (COP23) in November 2017. The final publications were presented at the COP 24 in November 2018. Additionally, short policy briefs on key research insights were communicated to climate negotiators and policy makers.