**Abstract**

This chapter presents the results of the exploratory qualitative research "Experiences of environmental justice of socio-environmental organizations and movements in Curicó-Chile and Antioquia-Colombia," carried out in 2020. The study allowed us to identify the purposes and foundations of social movements in the struggle for environmental justice in their territories. This gave us a glimpse of their link with social work intervention in general and specifically with leadership and organization for sustainability. The findings show that collective action is the articulating axis of socio-environmental organizations and movements, which constitutes a social force for the struggle against environmental inequality, defense of territory, and water.

**Keywords:** socio-environmental organizations and movements, sustainable leadership, environmental beliefs, social work and climate change, environmental justice
