Contract C40 Implementation Models C40 member cities will be expected to develop and begin implementing a climate action plan (or series of plans) before the end of 2020. The implementation will deliver action consistent with the ambitions of the Paris Agreement addressing both the need to reduce greenhouse gas (GHG) emissions and adapt to the impacts of climate change. Further, it will outline the wider social, environmental and economic benefits derived from implementing the plan and set out how the city will approach implementation of the plan in an inclusive manner using available powers, resources and partners. The basis of C40’s accelerated implementation strategy is to support cities where C40 has strong value to add and work alongside external organisations that work on climate change and urban development and/or with cities when necessary.