Teaching socioscientific issues presupposes integrating normative concepts with descriptive facts. Historically this has proved problematic firstly because science public examinations tend to focus on factual explanations, and secondly, facts are often treated separately from value-oriented knowledge. Critical Realism is based on explaining real open systems through the use of causal powers, tendencies of bodies to act under actuating circumstances, and emergent structures so that events can be explained through a range of interacting causes: physico-chemical, biological, socio-psychological, politico-economic. The manufacture of aluminum is discussed through a critical realist perspective and it is suggested that both production and consumption, and an awareness of social justice, are central to understanding SSIs.