"Data has power to inform, to motivate and to accelerate the realization of San Francisco's goals for greenhouse gas emission reduction from the built environment. Data is also essential to catalyzing development of neighborhood scale greening through Ecodistricts, where the public and private sectors set and meet common goals. Engaging with our counterparts in cities around the world – through the Cityzenith platform and development of mobile applications – is an opportunity to pool resources and best practices, as we harness data in service to sustainability and accessibility to the public."