The principal rationale for this chapter is to gather and assess the best available policy relevant knowledge from the available literature, including existing options and case studies, on what is known about the methods and approaches to implementation of possible mitigation and adaptation options, consistent with a strengthened global response to limit warming to 1.5oC above pre-industrial levels and related global greenhouse gas emission pathways, in the context of sustainable development and efforts to eradicate poverty. The chapter thus follows logically on an assessment of possible emissions pathways (Chapter 2), potential impacts of 1.5oC warming (Chapter 3), and the identification of priority mitigation and adaptation opportunities (Chapter 4) that could limit warming to 1.5oC. This chapter then would focus on existing mechanisms and on what is known about potential alternative implementation options and approaches through which the strengthened global response could be realized. To the extent the available literature allows, the chapter should assess how possible implementation approaches would impact the achievement of near-term (through 2030) sustainable development targets, and affect sustainable development pathways beyond 2030