EN
The article presents the results of studies on the entities that operate in city greenery area in the district of Praga Północ in Warsaw. The Praga studies were inspired by the American concept of city greenery handling by citizens which emphasises the role of citizen groups (non-government organisations, informal groups, individuals) in creating city greenery. The article looks for an answer to the question who, where and how is involved in work in city greenery area in Praga Północ. The studies were carried out as a questionnaire. The results supplied contact data about entities operating in city greenery area in the district, their goals, human resources (including volunteers), budget, area of operation, developed projects and initiatives concerned with greenery, the nature of operations (planning, maintenance of greenery, education, legal aid) and others. Much of the questionnaire was devoted to questions concerning the relations of the given entity with other entities (including scientists). The collected data were subjected to statistic treatment. Part of the results of the questionnaire were presented in charts. In the conclusions the author suggested some solutions propagating the idea of cooperation between various entities and leading to an increase in efficiency of operations concerned with city greenery.