Social work responses to environmental degradation have sought to mitigate harm that has already occurred and create strategies to respond or adapt to environmental hazards. Despite a good deal of literature suggesting the promise of prevention-focused models, social workers have less frequently considered prevention models to address environmental issues. In this manuscript, we consider how communities engaged in environmentally-based prevention work might inform the development of ecosocial work practice. We describe how a prevention-focused agenda, in partnership with communities, can be a promising avenue for ecosocial work practice to address the root causes of environmental degradation and its social impacts.