Our first and most popular report on eco-efficiency, It explains what eco-efficiency is and why it is so vital in today's competitive business world. Eco-efficiency: the business link to sustainable development (1997) Livio De Simone and Frank Popoff, two leading business figures, spell out the principles of eco-efficiency and present case studies of a number of international companies that are putting these principles into practice. The authors also discuss the value of partnerships across businesses and associations, communities, regulators and NGOs.