It was agreed that the cities, both of which are also "Zero Waste Cities", would work closely together and exchange experiences and specific challenges as well as common goals, particularly in the areas of waste prevention, recycling and waste management. The Department of Environment in San Francisco as well as the Environmental Protection Agency and the Waste Management Company in Kiel, as the specialist departments of the two partner cities, are in close contact regarding activities, legal framework conditions and the management of consumer behavior. There is a particular focus on the possibilities of waste prevention.