The action “neighborhood injection” constitutes for the organizers of  ‘p_public’, perhaps the most important movement for the improvement of urban environment. The objective of the “experiment”, is the viable reconstruction of ‘neighborhood’, both in terms of a functional, social unit and available natural, public resources, for rest, amusement and recreation. The improvement of the relation between structured environment and natural landscape, using as main tool the participative processes, was also part of the objectives.  All that, under the condition that a line of factors that are related with the historical course, the local tradition and the cultural background of each region of intervention, be taken into account.