The Initiative focuses on improving the urban environment, strengthening urban-rural linkages and the resilience of urban systems, services and populations to external shocks. Ensuring access to a healthy environment and healthy diets from sustainable agri-food systems, increasing availability of green spaces through urban and peri-urban forestry, it will also contribute to climate change mitigation and adaptation and sustainable resource management. A "Green Cities Network" will allow cities of all sizes - from megapolis to medium to small - to share experiences, best practices, successes and lessons learned, as well as build city-to-city cooperation opportunities.