The document is a declaration from Mayors and Governors meeting in Nagoya, Japan recognizing that rapid urbanization is a major driver of biodiversity loss. It acknowledges that local authorities have an important role to play in implementing objectives to prevent further loss. It outlines key actions that cities and local authorities can take to better manage and support biodiversity, such as through urban planning, resource management, and education. It pledges support for a plan of action to engage local governments in biodiversity conservation efforts through 2020.