In the recent years, the notion of sustainability has earned increasing attention due to public concerns regarding climate change. Regulatory and market pressures are forcing firms to be eco-efficient, i.e., to design products and services taking into account energy and material savings during production and the emissions that will be generated not only during production but also during the lifecycle of the product or service. Increasing the economic value-added per environmental footprint is a major strategic target for firms that consider themselves leaders.