Climate Change and Cities Second Assessment Report of the Urban Climate Change Research Network SUMMARY FOR CITY LEADERS ARC3.2 Figure 1: Components of the Second Assessment Report on Climate Change and Cities (ARC3.2) and their interactions. [...] Cities and their citizens already have begun to experi- and the community—need in order to assess current and future ence the effects of climate change. [...] The ARC3.2 Summary for City Leaders synthesizes Major They are assessing conditions within their cities in order to take Findings and Key Messages on urban climate science, disasters science-based actions that increase resilience and reduce green- and risks, urban planning and design, mitigation and adaptation, house gas emissions, thus limiting the rate of climate change and equity and environmen [...] These include the environmental and physical setting, the capac- ities and organization of institutions and gover- nance, economic and financial conditions, and so- cio-cultural characteristics. [...] Because of the comprehensive scope, it is important to clarify the roles and responsibilities of key actors in planning and • Mitigation and adaptation policies have different goals and implementation.