1. Introduction 1.1. Environmental urgency 1.2. Current dominant key ideas 1.3. Pragmatism and need for consensus 1.4. Plan 2. Milieu 2.1. Three-levels model 2.2. Background of the concept of milieu 2.3. Updating the idea of milieu 2.4. Medial matrix shaping individuals 2.5. Ethical action as medial imprint 2.6. Summary 3. Sustainability 3.1. Precaution, diversity and environmental autonomy 3.2. Normative implications 3.3. Limits and priorities 3.4. Summary 4. Responsibility 4.1. Imprints and contributory individual responsibility 4.2. Matrix and capacity-responsibility 4.3. Responsibility to do reparative actions 4.4. Pragmatic safeguards 4.5. Summary 5. Conclusion