1. Figure 1: Circular Flow Diagram

2. Figure 2: World Economy Embedded in World Ecosystem

3. Figure 3: From Ecosystem to Economy
Source: Charles Hall

4. Figure 4: Herman Daly’s Definition of Sustainable Use of Resources

5. Figure 5: The Great Gap
Source: Colin Campbell, Association for the Study of Peak Oil

6. Figure 6: Total Liquids Production and Net Energy
Source: Colin Campbell, Association for the Study of Peak Oil

7. Figure 7: CO2 Level in Atmosphere
Source: Charles David Keeling

8. Figure 8: Global Temperature
Source: NASA