This book is a collection of reflections and analyses of the state of the art of the ’waste issue’ and how this theme is being addressed in basic education. We have taken Critical Environmental Education (CE) as our guiding principle, understood here as a methodology of analysis that starts from a sequential practice and apprehension of reality through perception and an attitude of critical-reflective investigation. We chose the issue of urban rubbish as the theme, as it is a fundamental issue to be worked on in the development of children and adolescents, who are more concerned with ecological aspects such as rubbish in cities, air pollution, the issue of water, solid waste, among others. The central aim of this study is to map the state of the art on the issue of urban rubbish, with CAT as a fundamental category in the process of transforming the means and forms of apprehending reality. Based on this context, the question that drives this work has as its main locus the set of competences and skills to be mediated in the teaching-learning process based on the issue of rubbish.