- Factor Four: Doubling Wealth, Halving Resource Use - A Report to the Club of Rome
- Factor Five: Transforming the Global Economy Through 80% Improvements in Resource Productivity
- Knowing Our Worth: Conversations on Energy and Sustainability
- Grenzen-Los?: Jedes System Braucht Grenzen - Aber Wie Durchlassig Mussen Diese Sein?
- Harvest of Devastation: The Industrialization of Agriculture and Its Human and Environmental Consequences