Resumen
This article reflects on the recent unsustainable land use changes in the Autonomous Community of Madrid and asserts the need for progress towards economically, environmentally and socially sustainable development models. Following research undertaken over the last six years there are encouraging signs of agreement between stakeholders and the problem has begun to ?open up?. Here a new phase of problem solving is initiated, in which particular tendencies toward unsustainability are identified using a variety of basic indicators. These ?Sustainability Action Areas? can be targeted for collaborative sustainability initiatives involving groups of municipalities aggregated according to their response to particular indicators.